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nRF9160 AT+CCLK response time does not take into account the time zone difference

hello.

Running the serial_lte_modem example on the nRF9160 DK board, I get a problematic response to AT+CCLK

[2021-08-12 15:14:55.852] [00:01:05.883,000] INF MODEM_FSM : process_cmd_response cmd 26, length 31, response : +CCLK: "21/08/12,12:14:55+12"

As you can see, our local time is 15:14:55, and the modem response with "12:14:55+12". It should have written "15:14:55+12" instead.

That is the behavior from other LTE modems we use, and also here is another link that reflects this.

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