"Sun, 12 Jan 2025 15:15:15"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20250112
Only TIME
15:15:15
General datetime
2025-01-12 15:15:15Z
For Database
2025-01-12 15:15:15
For HTTP1.1
Sun, 12 Jan 2025 15:15:15 GMT