Fix: Calendar fix for DST

[MYKEU]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

Fixes calendar chart layout when user is in a timezone with DST

Fixed issues

#12143
#10430

Details

Before: What was the problem?

When user is in a timezone with DST, the last several months of the year on the calendar chart begin to overlap eachother.

After: How is it fixed in this PR?

The fix is based on the solution from #10430

There is currently another PR attempting to fix this problem here: #12081 - however, from testing, it did not appear to correct the problem.

Usage

Are there any API changes?

• The API has been changed.

Related test cases or examples to use the new APIs

NA.

Others

Merging options

• Please squash the commits into a single one when merge.

Other information

[echarts-bot]

Thanks for your contribution!
The community will review it ASAP. In the meanwhile, please checkout the coding standard and Wiki about How to make a pull request.

[damiangreen]

This fix works great for us, would be nice to get this merged

[Ovilia]

@damiangreen This PR is schedule for 4.8.0 so it will be reviewed soon. Thanks!

[damiangreen]

Thanks @Ovilia , we're really looking forward to it

[echarts-bot]

Congratulations! Your PR has been merged. Thanks for your contribution! 👍

[damiangreen]

Great! When will it hit npm?

[Ovilia]

@damiangreen We need a few more weeks to go through Apache release progress, which usually takes about 2-4 weeks.

[MYKEU]

@Ovilia I have checked the master branch recently and noticed that my changes have been reverted - do you mind confirming what happened please? Possible merge conflict issue?

https://github.com/apache/incubator-echarts/commits/master/src/coord/calendar/Calendar.js

[100pah]

@mikeyshing88 Thanks for your carefully check. Sorry I should have made some comment.
The PR is merged. But then I made little change based on the code located, because it seams not entirely perfect considering the context surrounding the code.
The code snippet behind the modified code was added before to the resolve another DST issue. But it did not do it correct in some cases we currently found. I modify it to cover this cases. I am not totally sure it is a best way to resolve DST issue in that way. But logically it seams correct to cover all of the cases.