Time conversion between est and utc

[Himmi]

I want to convert time from est to utc. Do help regarding this.Is there any function for this.

[Himmi]

I want the conversion using c.

[weaknessforcats]

All you need to do is add or subtract a number of hours from a given time.

Standard time functions (<time.h> will give you the specified time in seconds, which you can then add/subtract the offset of est from utc. Other functons allow you to format the result into a time string.

[whodgson]

I think you would need to know the longitude of the e.s.t. location to calculate ut (the old GMT)