fix: DST timezone bug

[dongsik-yoo]

Please check if the PR fulfills these requirements

• It's submitted to right branch according to our branching model
• It's right issue type on title
• When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)
• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes/features)
• Docs have been added/updated (for bug fixes/features)
• It does not introduce a breaking change or has description for the breaking change

Description

#257
#258
#283

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Thank you for your contribution to TOAST UI product. 🎉 😘 ✨

[jungeun-cho]

[3/6]이견없습니다. 고생많으셨어요 👍

[cemrekahveci]

Hi! I was really happy to see that there was a fix, but it didn't work when I tried it. Now I see that the checks have failed. Is there any progress on this issue?

[dongsik-yoo]

@cemrekahveci I've tried to fix this now. It's in progress. Can you provide what you are using DST information?

[cemrekahveci]

@cemrekahveci I've tried to fix this now. It's in progress. Can you provide what you are using DST information?

Do you mean what my timezone is currently? It's Europe/Amsterdam.

[dongsik-yoo]

@cemrekahveci Yes I do. Thank you very much.

[hkarabakla]

Hello,
I'm also looking forward this fix, is there any progress ?

[antoarva]

Hello,
same problem here.

[dongsik-yoo]

I'm in progress now! I'll be back with good news!

[dongsik-yoo]

@cemrekahveci @hkarabakla @antoarva
Please confirm this fix version.

[antoarva]

@dongsik-yoo I replaced the new files from dist location and still when I create a slot in November it is shown 1 hour later than it really is

[dongsik-yoo]

@antoarva Please give me some information.
What is your timezone name? Is the calendar type daily or weekly or monthly?
And let me know the date and year of November.

I fixed many issue about DST, but I can't fix an issue about 1 hour later thing yet on the day of time change. I think it will take longer time to fix.

[antoarva]

@dongsik-yoo My timezone is Europe/Amsterdam. In both weekly and daily view when I create a new schedule at 1 am the slot appeared on 2 am and this is happening from the first week of November 2019 until the last week of March 2020. Obviously does not take into account the summer time during that period.

[dongsik-yoo]

I close this PR which solves #257 and #283.
#258 still remains unresolved. I'll be on another PR.