March and October get messed up in Safari

[wojtekmaj]

@jtwhittington reported in wojtekmaj/react-date-picker#14:

Happens only on Safari so far that I've seen. March duplicates itself and replaces April once you go back some years - October does the same to November. Looking into it myself, though if you have any ideas I'd be happy to hear them. Will make a PR if I figure it out.

[wojtekmaj]

The reason for this is very simple. To format date, I take the beginning of each month and use Intl.DateTimeFormat to get the name of the month in a given language. However, historical timezones are messed up on WebKit for some years. On Chrome, it happens for 1995 in my case.
I have filed a bug on that in Chrome already.
A workaround would be to use something like the middle of the month for taking month name and I think that would be a good approach.

[wojtekmaj]

Fixed, will be public with next release.

[jtwhittington]

Yeah I realized this was a bug on the Intl.DateTimeFormat, thanks for the fix!

[wojtekmaj]

Thank you for reporting! ;)