# POSIX month

**URL:** https://discourse.julialang.org/t/posix-month/58572
**Category:** Internals & Design
**Tags:** question, dates
**Created:** [April 4, 2021, 8:12pm UTC](https://discourse.julialang.org/t/posix-month/58572 "2021-04-04T20:12:45Z")
**Posts on this page:** 2
**Page:** 1

<div class="post-metadata">

### Author: ![mberlinger3](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mberlinger3/32/23634_2.png) [@mberlinger3](https://discourse.julialang.org/u/mberlinger3)
#### Post date: [April 4, 2021, 8:12pm UTC](https://discourse.julialang.org/t/posix-month/58572/1 "2021-04-04T20:12:46Z")

</div>

I’m curious as to why U/u was implement in the dates packages for month and month abbr. respectively. I believe the POSIX standard is B/b according to the Linux manual below:

[https://pubs.opengroup.org/onlinepubs/007908799/xsh/strftime.html](https://pubs.opengroup.org/onlinepubs/007908799/xsh/strftime.html)

Through me for a bit of a loop at the beginning.

---

<div class="post-metadata">

### Author: ![jzr](https://avatars.discourse-cdn.com/v4/letter/j/eb9ed0/32.png) [@jzr](https://discourse.julialang.org/u/jzr)
#### Post date: [April 4, 2021, 8:44pm UTC](https://discourse.julialang.org/t/posix-month/58572/2 "2021-04-04T20:44:43Z")

</div>

[Python’s `datetime`](https://docs.python.org/3/library/datetime.html) uses U/u for week like Unix does.

[So does R](https://www.rdocumentation.org/packages/base/versions/3.6.2/topics/strptime).

I’m not a Julia committer, but this seems like a mistake in Julia. I’d file an issue.