Re^2: Simple date and time manipulation

[thargas]

Since you're using UTC, you don't have to worry about DST, but leap seconds may still be a consideration. You don't say if this is a one-shot program, nor whether the times may be in the future. With leap seconds, future times cannot be accurately predicted. If you're not worried about leap-seconds, just adding the appropriate offset as Utilitarian suggests is probably your best bet.