New submission from Bartosz Kaznowski <bartekkaznow...@gmail.com>:
When you convert a date pre the year 1000 to a string with `%Y` as the
formatter and then back to a date again then it fails. This is because `%Y`
expects it to be formatted with leading zeroes. For example, the year 1/01/01
(yyyy/mm/dd) should be 0001/01/01 when formatting using %Y/%m/%d. However, %Y
returns 1.
You can see this in action here:
from datetime import date, datetime
format = "%Y-%m-%d"
formatted = date.min.strftime("%Y-%m-%d")
datetime.strptime(formatted, format).date()
`ValueError: time data '1-01-01' does not match format '%Y-%m-%d'` is raised on
the forth line.
----------
components: Library (Lib)
messages: 397329
nosy: bkaznowski
priority: normal
severity: normal
status: open
title: Format issue with strftime and %Y
type: behavior
versions: Python 3.7
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue44610>
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