"Sat, 18 Jan 2025 08:21:00"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250118
Only TIME
08:21:00
General datetime
2025-01-18 08:21:00Z
For Database
2025-01-18 08:21:00
For HTTP1.1
Sat, 18 Jan 2025 08:21:00 GMT