"Sat, 14 Jun 2025 14:45:05"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250614
Only TIME
14:45:05
General datetime
2025-06-14 14:45:05Z
For Database
2025-06-14 14:45:05
For HTTP1.1
Sat, 14 Jun 2025 14:45:05 GMT