diff --git a/Common/read_field_indices.F90 b/Common/read_field_indices.F90
index 665285f2db0967bdbcf878118c1f762386ca7f5a..eb2873c459dece6d733b71deea1a0a6023725679 100644
--- a/Common/read_field_indices.F90
+++ b/Common/read_field_indices.F90
@@ -21,7 +21,7 @@ contains
 
     if (rank == 0) then
        call dbf_get_field_index_03(hshp%extremum, "ssh", hshp%extr_ssh)
-       call dbf_get_field_index_03(hshp%extremum, "days_1950", hshp%extr_date)
+       call dbf_get_field_index_03(hshp%extremum, "date", hshp%extr_date)
        call dbf_get_field_index_03(hshp%extremum, "eddy_index", &
             hshp%extr_eddy_index)
        call dbf_get_field_index_03(hshp%extremum, "valid", hshp%extr_valid)
@@ -30,7 +30,7 @@ contains
        call dbf_get_field_index_03(hshp%outermost, "r_eq_area", &
             hshp%out_r_eq_area)
        call dbf_get_field_index_03(hshp%outermost, "ssh", hshp%out_ssh)
-       call dbf_get_field_index_03(hshp%outermost, "days_1950", hshp%out_date)
+       call dbf_get_field_index_03(hshp%outermost, "date", hshp%out_date)
        call dbf_get_field_index_03(hshp%outermost, "eddy_index", &
             hshp%out_eddy_index)
        call dbf_get_field_index_03(hshp%outermost, "radius4", hshp%out_radius4)
@@ -38,8 +38,7 @@ contains
        call dbf_get_field_index_03(hshp%max_speed, "r_eq_area", &
             hshp%max_speed_r_eq_area)
        call dbf_get_field_index_03(hshp%max_speed, "ssh", hshp%max_speed_ssh)
-       call dbf_get_field_index_03(hshp%max_speed, "days_1950", &
-            hshp%max_speed_date)
+       call dbf_get_field_index_03(hshp%max_speed, "date", hshp%max_speed_date)
        call dbf_get_field_index_03(hshp%max_speed, "eddy_index", &
             hshp%max_speed_eddy_index)
     end if
diff --git a/Common/read_snapshot.f90 b/Common/read_snapshot.f90
index 295d3c9121a1104af0a15b2ddf4279d278fc63f6..f2e8142f854923b39e17f3b1b539d60aa2f26f3e 100644
--- a/Common/read_snapshot.f90
+++ b/Common/read_snapshot.f90
@@ -35,7 +35,7 @@ contains
 
     ! Local:
     integer ishape, ishape_first
-    integer d ! date, in days since 1950-1-1
+    integer d ! date
     integer i ! eddy index
     type(eddy) e
 
diff --git a/Common/shpc_create.f90 b/Common/shpc_create.f90
index 0c896b6b3dd2b0ab6ac778e09c3f60fcd6e2434f..12ad0cb025d226013059997724c2af2e5accae33 100644
--- a/Common/shpc_create.f90
+++ b/Common/shpc_create.f90
@@ -26,7 +26,7 @@ contains
          hshp%extremum)
     call dbf_add_field_03(hshp%extr_ssh, hshp%extremum, 'ssh', ftdouble, &
          nwidth = 13, ndecimals = 6)
-    call dbf_add_field_03(hshp%extr_date, hshp%extremum, 'days_1950', &
+    call dbf_add_field_03(hshp%extr_date, hshp%extremum, 'date', &
          ftinteger, nwidth = 5, ndecimals = 0)
     call dbf_add_field_03(hshp%extr_eddy_index, hshp%extremum, 'eddy_index', &
          ftinteger, nwidth = 5, ndecimals = 0)
@@ -41,7 +41,7 @@ contains
          'r_eq_area', ftdouble, nwidth = 10, ndecimals = 4)
     call dbf_add_field_03(hshp%out_ssh, hshp%outermost, 'ssh', ftdouble, &
          nwidth = 13, ndecimals = 6)
-    call dbf_add_field_03(hshp%out_date, hshp%outermost, 'days_1950', &
+    call dbf_add_field_03(hshp%out_date, hshp%outermost, 'date', &
          ftinteger, nwidth = 5, ndecimals = 0)
     call dbf_add_field_03(hshp%out_eddy_index, hshp%outermost, 'eddy_index', &
          ftinteger, nwidth = 5, ndecimals = 0)
@@ -54,7 +54,7 @@ contains
          'r_eq_area', ftdouble, nwidth = 10, ndecimals = 4)
     call dbf_add_field_03(hshp%max_speed_ssh, hshp%max_speed, 'ssh', &
          ftdouble, nwidth = 13, ndecimals = 6)
-    call dbf_add_field_03(hshp%max_speed_date, hshp%max_speed, 'days_1950', &
+    call dbf_add_field_03(hshp%max_speed_date, hshp%max_speed, 'date', &
          ftinteger, nwidth = 5, ndecimals = 0)
     call dbf_add_field_03(hshp%max_speed_eddy_index, hshp%max_speed, &
          'eddy_index', ftinteger, nwidth = 5, ndecimals = 0)
diff --git a/Common/util_eddies.py b/Common/util_eddies.py
index a4be56cb8438df07c2aabb748f4a70d7dc8d5e85..9dfb101218d2096203e0a50d471369539b31d35e 100644
--- a/Common/util_eddies.py
+++ b/Common/util_eddies.py
@@ -3,8 +3,8 @@ import math
 from os import path
 import numpy as np
 
-def comp_ishape(handler, days_1950, eddy_index):
-    k = days_1950 - handler["d_init"]
+def comp_ishape(handler, date, eddy_index):
+    k = date - handler["d_init"]
     
     if k == 0:
         ishape = eddy_index - 1
@@ -31,7 +31,7 @@ def open_shpc(shpc_dir):
         except shapefile.ShapefileException:
             print(f"Shapefile {layer} not found in {shpc_dir}.")
 
-    handler["d_init"] = handler["readers"]["extremum"].record(0).days_1950
+    handler["d_init"] = handler["readers"]["extremum"].record(0).date
     fname = path.join(shpc_dir, "ishape_last.txt")
 
     try:
diff --git a/Common/write_eddy.f90 b/Common/write_eddy.f90
index 5b22294efae02ae1289bab6ebf05618dbe1a9673..22fa2ff7468aa182d1162b762d0a097a1468cbb1 100644
--- a/Common/write_eddy.f90
+++ b/Common/write_eddy.f90
@@ -4,7 +4,7 @@ module write_eddy_m
 
 contains
 
-  subroutine write_eddy(e, hshp, days_1950, i)
+  subroutine write_eddy(e, hshp, date, i)
 
     use, intrinsic:: ieee_arithmetic, only: ieee_is_nan
 
@@ -18,7 +18,7 @@ contains
 
     type(eddy), intent(in):: e
     TYPE(shpc), intent(in):: hshp
-    integer, intent(in):: days_1950 ! date
+    integer, intent(in):: date
     integer, intent(in):: i ! eddy index
 
     ! Local:
@@ -32,8 +32,7 @@ contains
 
     call dbf_write_attribute_03(hshp%extremum, ishape, hshp%extr_ssh, &
          e%ssh_extr)
-    call dbf_write_attribute_03(hshp%extremum, ishape, hshp%extr_date, &
-         days_1950)
+    call dbf_write_attribute_03(hshp%extremum, ishape, hshp%extr_date, date)
     call dbf_write_attribute_03(hshp%extremum, ishape, hshp%extr_eddy_index, i)
     call dbf_write_attribute_03(hshp%extremum, ishape, hshp%extr_valid, &
          merge(1, 0, e%valid))
@@ -71,8 +70,7 @@ contains
 
     call dbf_write_attribute_03(hshp%outermost, ishape, hshp%out_ssh, &
          e%out_cont%ssh)
-    call dbf_write_attribute_03(hshp%outermost, ishape, hshp%out_date, &
-         days_1950)
+    call dbf_write_attribute_03(hshp%outermost, ishape, hshp%out_date, date)
     call dbf_write_attribute_03(hshp%outermost, ishape, hshp%out_eddy_index, &
          i)
     call dbf_write_attribute_03(hshp%outermost, ishape, hshp%out_radius4, &
@@ -89,7 +87,7 @@ contains
     call dbf_write_attribute_03(hshp%max_speed, ishape, hshp%max_speed_ssh, &
          e%speed_cont%ssh)
     call dbf_write_attribute_03(hshp%max_speed, ishape, hshp%max_speed_date, &
-         days_1950)
+         date)
     call dbf_write_attribute_03(hshp%max_speed, ishape, &
          hshp%max_speed_eddy_index, i)
 
diff --git a/Convert_Matlab/inst_eddies_v6.py b/Convert_Matlab/inst_eddies_v6.py
index 64d727209375574a9c9e23c215341af8995041d8..ee5731035a891820ec76406d04a4f6dce34c0836 100755
--- a/Convert_Matlab/inst_eddies_v6.py
+++ b/Convert_Matlab/inst_eddies_v6.py
@@ -28,22 +28,22 @@ def define_fields(writers):
     """writers is a dictionary of shapefile.Writer objects."""
     
     writers["extr"].field("ssh", "N", 13, 6)
-    writers["extr"].field("days_1950", "N", 5)
+    writers["extr"].field("date", "N", 5)
     writers["extr"].field("eddy_index", "N", 5)
     writers["extr"].field("valid", "N", 1)
     writers["extr"].field("speed", "N", 13, 6)
 
-    writers["centroid"].field("days_1950", "N", 5)
+    writers["centroid"].field("date", "N", 5)
     writers["centroid"].field("eddy_index", "N", 5)
 
     writers["outer"].field("r_eq_area", "N", 10, 4)
     writers["outer"].field("ssh", "N", 13, 6)
-    writers["outer"].field("days_1950", "N", 5)
+    writers["outer"].field("date", "N", 5)
     writers["outer"].field("eddy_index", "N", 5)
 
     writers["max_speed"].field("r_eq_area", "N", 10, 4)
     writers["max_speed"].field("ssh", "N", 13, 6)
-    writers["max_speed"].field("days_1950", "N", 5)
+    writers["max_speed"].field("date", "N", 5)
     writers["max_speed"].field("eddy_index", "N", 5)
 
 def write_to_shp(writers, cyclone, d, cell = None, X = None, Y = None,
@@ -78,7 +78,7 @@ def write_to_shp(writers, cyclone, d, cell = None, X = None, Y = None,
                 j = np.argwhere(Y == eddy[1]).item()
                 speed = 1e4 if np.isnan(eddy[12]) else eddy[12] # Azimuthal Vit
                 writers["extr"].record(ssh = ADT[i, j], valid = 1,
-                                       days_1950 = d, eddy_index = eddy_index,
+                                       date = d, eddy_index = eddy_index,
                                        speed = speed)
 
                 # Amplitude Out:
@@ -88,11 +88,10 @@ def write_to_shp(writers, cyclone, d, cell = None, X = None, Y = None,
                     ssh =  ADT[i, j] - eddy[7]
 
                 writers["centroid"].point(eddy[2], eddy[3]) # [XY]centroid
-                writers["centroid"].record(days_1950 = d,
-                                           eddy_index = eddy_index)
+                writers["centroid"].record(date = d, eddy_index = eddy_index)
 
                 writers["outer"].record(r_eq_area = eddy[6], ssh = ssh,
-                                        days_1950 = d, eddy_index = eddy_index)
+                                        date = d, eddy_index = eddy_index)
                 # (eddy[6] is Equivalent Radius Out)
 
                 polyline = np.stack((eddy[4], eddy[5]), axis = 1).tolist()
@@ -107,8 +106,7 @@ def write_to_shp(writers, cyclone, d, cell = None, X = None, Y = None,
                     ssh =  ADT[i, j] - eddy[11]
 
                 writers["max_speed"].record(r_eq_area = eddy[10], ssh = ssh,
-                                            days_1950 = d,
-                                            eddy_index = eddy_index)
+                                            date = d, eddy_index = eddy_index)
                 # (eddy[10] is Equivalent Radius Vit)
 
                 polyline = np.stack((eddy[8], eddy[9]), axis = 1).tolist()
diff --git a/Inst_eddies/Analysis/eddy_dump.py b/Inst_eddies/Analysis/eddy_dump.py
index 1eb2c95914c7cffedfb9b13737f9dd65c13ff4aa..5fd2bff0fef1d0c1e91990f43d6a75fc1a3403c2 100755
--- a/Inst_eddies/Analysis/eddy_dump.py
+++ b/Inst_eddies/Analysis/eddy_dump.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python3
 
-"""Dumps all information on a particular eddy, specified by days_1950
+"""Dumps all information on a particular eddy, specified by date
 and eddy_index.
 
 """
@@ -23,8 +23,8 @@ handler = util_eddies.open_shpc(args.directory)
 if args.ishape:
     ishape = args.ishape
 else:
-    reply = input("days_1950, eddy_index = ? ").split(",")
-    days_1950 = int(reply[0])
+    reply = input("date, eddy_index = ? ").split(",")
+    date = int(reply[0])
     eddy_index = int(reply[1])
 
     # Find ishape:
@@ -33,13 +33,13 @@ else:
 
         for ishape, rec \
             in enumerate(handler["readers"]["extremum"].iterRecords()):
-            if rec["days_1950"] == days_1950 \
+            if rec["date"] == date \
                and rec["eddy_index"] == eddy_index:
                 break
         else:
             sys.exit("Eddy with this date and index not found")
     else:
-        ishape = util_eddies.comp_ishape(handler, days_1950, eddy_index)
+        ishape = util_eddies.comp_ishape(handler, date, eddy_index)
         
 for layer in ["extremum", "outermost_contour", "max_speed_contour", "centroid"]:
     if layer in handler["readers"]:
diff --git a/Inst_eddies/Tests/test_get_1_outerm.f90 b/Inst_eddies/Tests/test_get_1_outerm.f90
index 52869b1e91bb4cf90d4ab86072de36ff52a2aba4..bb5a02557a9fed2ce755f3afb256b1c100cd9613 100644
--- a/Inst_eddies/Tests/test_get_1_outerm.f90
+++ b/Inst_eddies/Tests/test_get_1_outerm.f90
@@ -17,7 +17,7 @@ program test_get_1_outerm
 
   implicit none
 
-  integer ncid, varid, unit, n, l, days_1950
+  integer ncid, varid, unit, n, l, date
   real longitude(2) ! in rad
   real latitude(2) ! in rad
   real step(2) ! in rad
@@ -61,8 +61,8 @@ program test_get_1_outerm
   call nf95_gw_var(ncid, varid, ssh)
 
   call nf95_close(ncid)
-  print *, "days_1950 = ?"
-  read *, days_1950
+  print *, "date = ?"
+  read *, date
   step = [longitude(2) - longitude(1), latitude(2) - latitude(1)]
 
   print *, "Reading from outside_points.csv..."
@@ -97,7 +97,7 @@ program test_get_1_outerm
      e%radius4 = - 1
      e%valid = .true.
      call shpc_create(hshp, shpc_dir = "SHPC", cyclone = cyclone)
-     call write_eddy(e, hshp, days_1950, i = 1)
+     call write_eddy(e, hshp, date, i = 1)
      CALL shpc_close(hshp)
      print *, 'Created "SHPC".'
   else
diff --git a/Inst_eddies/Tests/test_set_all_outerm.f90 b/Inst_eddies/Tests/test_set_all_outerm.f90
index 27d5323da4663a93690de01352746295fca04972..dcb4be66038600195101aefc38c7f8231378de20 100644
--- a/Inst_eddies/Tests/test_set_all_outerm.f90
+++ b/Inst_eddies/Tests/test_set_all_outerm.f90
@@ -96,10 +96,10 @@ program test_set_all_outerm
   do i = 1, s%number_extr
      if (s%list(i)%cyclone) then
         n_cyclo = n_cyclo + 1
-        call write_eddy(s%list(i), hshp_cyclo, days_1950 = 1, i = n_cyclo)
+        call write_eddy(s%list(i), hshp_cyclo, date = 1, i = n_cyclo)
      else
         n_anti = n_anti + 1
-        call write_eddy(s%list(i), hshp_anti, days_1950 = 1, i = n_anti)
+        call write_eddy(s%list(i), hshp_anti, date = 1, i = n_anti)
      end if
   end do
 
diff --git a/Inst_eddies/inst_eddies.f90 b/Inst_eddies/inst_eddies.f90
index 3a3c9e270185cb924feaf7dd13045601079014c1..735d1d927b465bb46cb3060a7dee020e8e8d7f68 100644
--- a/Inst_eddies/inst_eddies.f90
+++ b/Inst_eddies/inst_eddies.f90
@@ -26,7 +26,7 @@ program inst_eddies
 
   type(snapshot) s
   TYPE(shpc) hshpc_cyclo, hshpc_anti
-  integer i, days_1950, n_cyclo, n_anti
+  integer i, date, n_cyclo, n_anti
 
   integer ncid, dimid, varid, copy
 
@@ -74,8 +74,8 @@ program inst_eddies
        "inst_eddies: not enough IEEE support")
   inquire(file = "SHPC_cyclo/extremum.shp", exist = exist)
   call config(exist) ! We need main_nml before looking at the input files.
-  print *, "days_1950 = ?"
-  read *, days_1950
+  print *, "date = ?"
+  read *, date
 
   call nf95_open("h.nc", nf90_nowrite, ncid)
 
@@ -187,10 +187,10 @@ program inst_eddies
   do i = 1, s%number_extr
      if (s%list(i)%cyclone) then
         n_cyclo = n_cyclo + 1
-        call write_eddy(s%list(i), hshpc_cyclo, days_1950, n_cyclo)
+        call write_eddy(s%list(i), hshpc_cyclo, date, n_cyclo)
      else
         n_anti = n_anti + 1
-        call write_eddy(s%list(i), hshpc_anti, days_1950, n_anti)
+        call write_eddy(s%list(i), hshpc_anti, date, n_anti)
      end if
   end do
 
diff --git a/Overlap/get_snapshot.f90 b/Overlap/get_snapshot.f90
index dd905cd5273ff2bc5ff2aa7fc4b941292eab3a9f..b2fa3cf3182de0516007776272d791993eabece3 100644
--- a/Overlap/get_snapshot.f90
+++ b/Overlap/get_snapshot.f90
@@ -24,10 +24,7 @@ contains
     real, intent(in):: step(:) ! (2) longitude and latitude steps, in rad
     integer, intent(in):: copy
     TYPE(shpc), intent(in):: hshp
-
-    integer, intent(in):: d_init
-    ! first date in the collection of shapefiles, in days since 1950-1-1
-
+    integer, intent(in):: d_init ! first date in the collection of shapefiles
     integer, intent(in):: k ! date index
     integer, intent(in):: k_end ! last date index analyzed by this MPI process
     integer, intent(in):: rank ! of MPI process
diff --git a/Overlap/plot_traj.py b/Overlap/plot_traj.py
index cf4a2200b4ea72de5c7b1d38db54230ebe16dbdf..3ece8f90e8d66f7f9076eabb6a899aab0138c7e1 100755
--- a/Overlap/plot_traj.py
+++ b/Overlap/plot_traj.py
@@ -37,7 +37,7 @@ def is_node_type(G, n, label):
     elif label == "important":
         return G.in_degree[n] == 0 or G.out_degree[n] == 0 or G.degree[n] >= 3
     elif isinstance(label, int):
-        return node_to_date_eddy(n, e_overestim, d_init)["days_1950"] == label
+        return node_to_date_eddy(n, e_overestim, d_init)["date"] == label
 
 def plot_nbunch(G, nbunch, color = '#1f78b4', label = None, ax = None):
     if ax is None: ax = plt.gca()
diff --git a/Overlap/report_graph.py b/Overlap/report_graph.py
index c8e695b6b45c6909cbc2affe19b8540b61673c37..4c4c9bf672b8f1003874345befdc1bf9d66a531e 100755
--- a/Overlap/report_graph.py
+++ b/Overlap/report_graph.py
@@ -20,7 +20,7 @@ def node_to_date_eddy(node_index, e_overestim, d_init):
     k = (node_index - 1) // e_overestim
     d = d_init + k
     return {"eddy_index": node_index - k * e_overestim, "date_index": k,
-            "days_1950": d}
+            "date": d}
 
 def date_eddy_to_node(d, eddy_index, e_overestim, d_init):
     """Convert from eddy identification in shapefiles to node
@@ -52,7 +52,7 @@ def read_eddy_graph(edgelist, shpc_dir = None):
 def set_attribute(G, extr_file):
     with shapefile.Reader(extr_file) as s_read:
         for shape_rec in s_read:
-            n = date_eddy_to_node(shape_rec.record.days_1950,
+            n = date_eddy_to_node(shape_rec.record.date,
                                   shape_rec.record.eddy_index,
                                   G.graph["e_overestim"], G.graph["d_init"])
             
@@ -68,10 +68,10 @@ def to_eddy_agraph(G):
         date_eddy = node_to_date_eddy(n, G.graph["e_overestim"],
                                       G.graph["d_init"])
 
-        if date_eddy["days_1950"] not in my_subgraphs:
-            my_subgraphs[date_eddy["days_1950"]] = []
+        if date_eddy["date"] not in my_subgraphs:
+            my_subgraphs[date_eddy["date"]] = []
 
-        my_subgraphs[date_eddy["days_1950"]].append(n)
+        my_subgraphs[date_eddy["date"]].append(n)
 
     A = nx_agraph.to_agraph(G)
 
@@ -110,7 +110,7 @@ if __name__ == "__main__":
                         action = "store_true")
     parser.add_argument("-n", "--node",
                         help = "Select component containing node", nargs = 2,
-                        type = int, metavar = ("days_1950", "eddy_index"))
+                        type = int, metavar = ("date", "eddy_index"))
     parser.add_argument("-m", "--merging",
                         help = "Report merging and splitting events",
                         action = "store_true")