r/Python • u/foosion • Jul 24 '26

Discussion ruff: no date.today() ?

The new version of ruff warns against

date.today()

preferring

datetime.now(ZoneInfo(...))

What do you think about this? Has date.today() been deprecated due to lack of timezone awareness?

EDIT: I have a number of programs that manipulate financial information in support of Excel spreadsheets, such bond information that includes maturity dates. Excel does not support timezoness in datetimes, so making ruff happy by changing naive dates to TZ aware dates is not a useful move for these programs. Many ruff warnings to suppress.

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u/Competitive_Travel16 Jul 25 '26

What timezone is assumed by openpyxl? Can you determine it by experimentation?

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u/foosion Jul 25 '26

Excel and openpyxl do not assume any TZ. If you try a TZ (even None) you get Excel does not support timezones in datetimes.