Converting timezones in PHP 4.x

[B. G. Mahesh]

hi

I am using PHP 4.x and MySQL. The database has the list of countries,
cities and timezones.

I would like to convert the time from one zone to another zone [e.g.
if the time in Moscow is 4:00 AM on Sept 8, what is the time in NY].
It is not that difficult to convert but I was wondering if the
language itself supports the conversion which I would prefer using.

Any other tips is appreciated

regards,

bgm