Date parsing in strict mode doesn't allow timezone in "-01:00" format
Open
- Dominant language
- JavaScript
- Stars
- 48.7k
- Forks
- 2.5k
- PR merge metrics
- No merged PRs in 30d
Description
**Describe the bug**
Date parsing in strict mode doesn't work when the timezone is in +/-HH:MM.

**Expected behavior**
Parsing should happen properly.
**Information**
- Day.js Version: 1.11.13
- OS: Ubuntu
- Browser: Firefox
- Time zone: Europe/Paris
Contributor guide
Research direction
No source file, entry point, or test is named in the report. Reproduce strict-mode parsing of a timezone in +/-HH:MM with Day.js 1.11.13, then locate the parsing logic and existing date-parsing tests. Done means the reported format parses correctly and a regression test covers it.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- javascript
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Needs clarification
- Newbie friendliness
- 35/100