"Sun, 18 Jan 1970 09:22:11"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700118
Only TIME
09:22:11
General datetime
1970-01-18 09:22:11Z
For Database
1970-01-18 09:22:11
For HTTP1.1
Sun, 18 Jan 1970 09:22:11 GMT