"Sun, 25 Jan 1970 19:39:34"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
19700125
Only TIME
19:39:34
General datetime
1970-01-25 19:39:34Z
For Database
1970-01-25 19:39:34
For HTTP1.1
Sun, 25 Jan 1970 19:39:34 GMT