"Sun, 18 Jan 1970 23:36:10"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700118
Only TIME
23:36:10
General datetime
1970-01-18 23:36:10Z
For Database
1970-01-18 23:36:10
For HTTP1.1
Sun, 18 Jan 1970 23:36:10 GMT