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#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
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#
# http://www.apache.org/licenses/LICENSE-2.0
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import datetime
[docs]def iso_to_gregorian(iso_year: int, iso_week: int, iso_day: int):
"""
Gregorian calendar date for the given ISO year, week and day.
Taken from: http://stackoverflow.com/a/33101215/492186.
Parameters
----------
iso_year
iso_week
From 1 to 53.
iso_day
From 1 to 7.
Returns
-------
date
"""
fourth_jan = datetime.date(iso_year, 1, 4)
_, fourth_jan_week, fourth_jan_day = fourth_jan.isocalendar()
return fourth_jan + datetime.timedelta(days=iso_day - fourth_jan_day, weeks=iso_week - fourth_jan_week)