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python/snippets/months-diff.md

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+---
+title: Date difference in months
+type: snippet
+tags: [date]
+cover: succulent-11
+dateModified: 2020-10-28T16:20:39+02:00
+---
+
+Calculates the month difference between two dates.
+
+- Subtract `start` from `end` and use `datetime.timedelta.days` to get the day difference.
+- Divide by `30` and use `math.ceil()` to get the difference in months (rounded up).
+
+```py
+from math import ceil
+
+def months_diff(start, end):
+  return ceil((end - start).days / 30)
+```
+
+```py
+from datetime import date
+
+months_diff(date(2020, 10, 28), date(2020, 11, 25)) # 1
+```