Luxon localizer has problem displaying Month in Chinese language

[RemLawrence]

Clear and concise description of the problem

When choosing Chinese/Japanese for calendar, in the header, the luxon localizer will only display the number of the months (e.g. 6 2017), instead of the actual localized month (e.g. 六月 2017) Read the issue from luxon side: https://github.com/moment/luxon/issues/628

Suggested solution

This line should be LLLL yyyy instead.

Alternative

No response

Additional context

No response

Validations

• [X] Read the docs.
• [X] Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

Would you like to open a PR for this feature?

• [X] I'm willing to open a PR

[cutterbl]

As a temporary fix, you can apply your own monthHeaderFormat

[RemLawrence]

Yes, already did that. Just want to point it out for future reference. Thanks!