"Sat, 15 Feb 2025 18:44:01"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250215
Only TIME
18:44:01
General datetime
2025-02-15 18:44:01Z
For Database
2025-02-15 18:44:01
For HTTP1.1
Sat, 15 Feb 2025 18:44:01 GMT