"Sat, 15 Feb 2025 19:25:55"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250215
Only TIME
19:25:55
General datetime
2025-02-15 19:25:55Z
For Database
2025-02-15 19:25:55
For HTTP1.1
Sat, 15 Feb 2025 19:25:55 GMT