Question

why there is a time lag of 2 hours between Gujarat and Arunachal Pradesh

Answer 1

because the time lack of 2 hours between gujarat and Arunachal Pradesh due to the sun rise in arunachal Pradesh village Dong of Anjaw distracts at average time 4:30am....

Answer 2

This causes a time lag of two hours from Gujarat to Arunachal Pradesh to avoid confusion and to have a standard time for reference, The 82.30'Eastern Longitude has been taken as the standard time for the whole country. ... The sun rises two hours earlier in Arunachal Pradesh as compared to Gujarat.