Calculating the number of seconds between two dates and time

[Saagar]

Hi sir

I am getting the current date and time from GPS module .  I want to calculate the number of second between 1 Jan 2000 and current date and time. but i am getting how to do it plz help 

Thanks in advance 

[awneil]

Surely, this is a standard problem - nothing specific to Nordic.

Can the GPS give you time in Unix form - ie, seconds since 00:00:00 UTC on 1 January 1970 - then the problem becomes trivial.

[Saagar]

Yes

GPS module -- sl869t3-i

Date and Time formate:

date =10:06:2020         (day/m/y)

Time in utc = 07:57:15 (h/min/sec)

Thankyou