From 1138ed6007da75ddbda3d64663cabb74678b8d79 Mon Sep 17 00:00:00 2001
From: Lars Barring <lars.barring@smhi.se>
Date: Sat, 30 Oct 2021 11:37:00 +0200
Subject: [PATCH] Map gregorian calendar to standard calendar (not the other
 way around)

---
 cf_units/__init__.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/cf_units/__init__.py b/cf_units/__init__.py
index d45bd671..4964db84 100644
--- a/cf_units/__init__.py
+++ b/cf_units/__init__.py
@@ -130,7 +130,7 @@
 #: Where calendars have multiple names, we map the alias to the
 #: definitive form.
 CALENDAR_ALIASES = {
-    CALENDAR_STANDARD: CALENDAR_GREGORIAN,
+    CALENDAR_GREGORIAN: CALENDAR_STANDARD,
     CALENDAR_NO_LEAP: CALENDAR_365_DAY,
     CALENDAR_ALL_LEAP: CALENDAR_366_DAY,
 }
@@ -830,7 +830,7 @@ def __init__(self, unit, calendar=None):
                 raise value_error from None
             if _OP_SINCE in unit.lower():
                 if calendar is None:
-                    calendar_ = CALENDAR_GREGORIAN
+                    calendar_ = CALENDAR_STANDARD
                 elif isinstance(calendar, (str,)):
                     calendar_ = calendar.lower()
                     if calendar_ in CALENDAR_ALIASES:
@@ -1815,7 +1815,7 @@ def convert(self, value, other, ctype=FLOAT64, inplace=False):
             # gregorian calendar as it handles these and udunits does not.
             if (
                 self.is_time_reference()
-                and self.calendar != CALENDAR_GREGORIAN
+                and self.calendar != CALENDAR_STANDARD
             ):
                 result_datetimes = cftime.num2date(
                     result, self.cftime_unit, self.calendar