"Sat, 15 Feb 2025 19:20:50"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250215
Only TIME
19:20:50
General datetime
2025-02-15 19:20:50Z
For Database
2025-02-15 19:20:50
For HTTP1.1
Sat, 15 Feb 2025 19:20:50 GMT