"Sat, 28 Jun 2025 14:45:09"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250628
Only TIME
14:45:09
General datetime
2025-06-28 14:45:09Z
For Database
2025-06-28 14:45:09
For HTTP1.1
Sat, 28 Jun 2025 14:45:09 GMT