SimCom SIM900 Series Command Manual page 6

SIM900 NTP AT Command Manual
<time> String type(string should be included in quotation marks) value;
format is "yy/MM/dd,hh:mm:ss", where characters indicate year (two last
digits),month, day, hour, minutes, seconds .E.g. 6th of May 2010, 00:01:52
equals to "10/05/06,00:01:52"
Reference Note
SIM900_NTP AT Command Manual_V1.00
64 Timeout
65 Server error
66 Operation not allow
5
9/22/2013