Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

Feature request: option to set week starting on Sunday instead of Monday

See original GitHub issue

Problem description

Currently, calling pd.Series.dt.weekday returns Monday = 0, Sunday = 6. It would be nice to have a settable option that allows Sunday to be the beginning of the week, e.g.

my_series.dt.weekday  # Monday = 0, Sunday = 6
pd.options.week_start = 'Sunday'
my_series.dt.weekday  # Sunday = 0, Saturday = 6

Pandas version 1.0.1.

Issue Analytics

State:
Created 4 years ago
Comments:8 (4 by maintainers)

Top GitHub Comments

1reaction

guidopetricommented, Feb 14, 2020

It is an easy workaround - but pandas is all about convenience, right? 😉

Here’s what I’m currently doing:

pd.Series.replace(6, -1, inplace=True)

0reactions

guidopetricommented, Feb 16, 2020

You’re correct in that date.weekday() returns the same output as pandas currently does - however, datetime also allows for strftime() to be called with %w for Sunday-first (or compare %W and %U). Is this the recommended route when dealing with pandas datetimes, too? It seems silly to convert to string then back for a library meant for efficiency, but I’ll accept it as long as it works…