Hi All, I have a page where the user specifies in which timezone they belong to and based on that i have to show the date & time. So I have to set the different timezones. For this I am using putenv function like: putenv("TZ=US/Eastern"); Now my question is whether it is fine to use putenv in the production environment? Whether the putenv changes the timezone value globally for all request or for the current request only? Please advise. Regards, Manoj