Kirtan is to be done in Raags.

Timings of Raags

TIME OF THE DAY OR NIGHTRAAGS 
6 am to 9 am
http://saadavirsa.com/raags-for-6-am-to-9-am/
9 am to 12 noonhttp://saadavirsa.com/raags-for-9-am-to-12-noon/
12 noon to 3 pmhttp://saadavirsa.com/raags-for-12-noon-to-3-pm/
3 pm to 6 pmhttp://saadavirsa.com/raags-for-3-pm-to-6-pm/
6 pm to 9 pmhttp://saadavirsa.com/raags-for-6-pm-to-9-pm/
9 pm to 12 midnighthttp://saadavirsa.com/raags-for-9-pm-to-midnight-12-am/
12 midnight to 3 amhttp://saadavirsa.com/raags-for-midnight-12-am-to-3-am/
3 am to 6 amhttp://saadavirsa.com/raags-for-3-am-to-6-am/