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/pandas 0.25

pandas.Timestamp.toordinal

Timestamp.toordinal()

Return proleptic Gregorian ordinal. January 1 of year 1 is day 1.

© 2008–2012, AQR Capital Management, LLC, Lambda Foundry, Inc. and PyData Development Team
Licensed under the 3-clause BSD License.
https://pandas.pydata.org/pandas-docs/version/0.25.0/reference/api/pandas.Timestamp.toordinal.html