"Sun, 25 Jan 1970 21:48:11"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700125
Only TIME
21:48:11
General datetime
1970-01-25 21:48:11Z
For Database
1970-01-25 21:48:11
For HTTP1.1
Sun, 25 Jan 1970 21:48:11 GMT