"Sat, 14 Jun 2025 14:45:30"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250614
Only TIME
14:45:30
General datetime
2025-06-14 14:45:30Z
For Database
2025-06-14 14:45:30
For HTTP1.1
Sat, 14 Jun 2025 14:45:30 GMT