pip install jdcal==1.4.1

Julian dates from proleptic Gregorian and Julian calendars.

Source
Among top 1000 packages on PyPI.
Over 17.8M downloads in the last 90 days.

Commonly used with jdcal

Based on how often these packages appear together in public requirements.txt files on GitHub.

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spyder

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Version usage of jdcal

Proportion of downloaded versions in the last 3 months (only versions over 1%).

1.4.1

98.01%

1.4

1.14%