Datepicker doesn't accept ISO 8601 with colon in time offset

[meixger]

Reproduction

https://formkit.link/0aa3abaef166adece938a6477f968539

Describe the bug

✅ 2023-01-01T11:00:00Z works ✅ 2023-01-01T12:00:00+0100 works ❌ 2023-01-01T12:00:00+01:00 fails with Error: Non ISO 8601 compliant date

FormKit datepicker Pro allows only Z as time zone designator or ±hhmm without colon as time offset.

---

ISO 8601 allow several time offsets (wikipedia):

• Z
• ±hh:mm
• ±hhmm
• ±hh

NB1: the time offset is validated against this regex: (Z|(?:\+|\-)[0-9]{4})?

NB2: somewhat related #675 Non ISO 8601 complient date when extra precision is given to datepicker PRO

Environment

Environment is not relevant to the issue.

[justin-schroeder]

Thanks for the detail — we’ll get this sorted out

[justin-schroeder]

This was fixed upstream in @formkit/tempo some time ago so should all be good to close here 👍