"Sun, 22 Jun 2025 14:45:02"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250622
Only TIME
14:45:02
General datetime
2025-06-22 14:45:02Z
For Database
2025-06-22 14:45:02
For HTTP1.1
Sun, 22 Jun 2025 14:45:02 GMT