"Sat, 12 Jul 2025 14:45:18"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250712
Only TIME
14:45:18
General datetime
2025-07-12 14:45:18Z
For Database
2025-07-12 14:45:18
For HTTP1.1
Sat, 12 Jul 2025 14:45:18 GMT