Colombo doesn't observe daylight saving time but Belgrade does. DST in Belgrade started on 31 March 2019 and will end on 27 October 2019. Once DST ends in Belgrade the time difference between Belgrade and Colombo will be 4:30 hours.
Time zone: CEST - Central European Summer Time (UTC/GMT +2)DST started on 31 March 2019DST will end on 27 October 2019Time zone difference / Flight distance
Time zone: IST - India Standard Time (UTC/GMT +5:30)Time zone difference / Flight distance