5:30pm
The difference between IST and UST: UST=00:00;IST=UST+5:30
The difference between CET and UST=UST+1:00
In 13:00 CET in India = UST+5:30+1=6:30
The difference between CET and UST=UST+1:00
In 13:00 CET in India = UST+5:30+1=6:30