Usage: https://datetime.link/DATETIME/ZONE_LIST

DATETIME:   Follows RFC3339 (based on ISO 8601)
Examples:   2006-01-02T15:04:05-07:00
            2020-11-10T17:17:00+08:00
            1970-01-01T00:00:00Z

ZONE_LIST:  A comma-separated list of zone IDs
            Zone IDs can be found at https://datetime.link/data/cities.json
            Zone IDs can also be fixed offsets
Examples:   Singapore-SG,+06:00,-08:30,London-England-GB
            St_John's-Newfoundland_and_Labrador-CA
            Tiruchirappalli-Tamil_Nadu-IN,New_York_City-New_York-US

For more information: https://serverwentdown.github.io/datetime.link/