How Far In Advance Must I Go To Renew Non "o"

[skooldaze]

My Non-Immigrant "O" visa expires on March 21, can I go this week (about two weeks early) to renew it or must I wait until the day of the expiry?

Thanks in advance for any advice.

[Mario2008]

You can go as early as 30 days before your permission to stay expires, and you are well adviced to go early and not to wait till the last day, incase you have to get some documents you might have forgotten.

Note that immigration extends from the day your current permission to stay expires, so you lose nothing by going early.

[Crossy]

About now would be the ideal time, within 30 days of expiry is the official line