"Fri, 18 Jul 2025 14:45:20"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250718
Only TIME
14:45:20
General datetime
2025-07-18 14:45:20Z
For Database
2025-07-18 14:45:20
For HTTP1.1
Fri, 18 Jul 2025 14:45:20 GMT