"Sat, 18 Jan 2025 21:49:40"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250118
Only TIME
21:49:40
General datetime
2025-01-18 21:49:40Z
For Database
2025-01-18 21:49:40
For HTTP1.1
Sat, 18 Jan 2025 21:49:40 GMT