When is the last day of filing my H1B extension?

My H1B will expire in 4 months (May 31, 2008).

When is the reasonable last day of filing H1B extension?
Should I get receipt before May 31st, so that I can keep working without any gap?
Currently, how long does it take to get the receipt?

Thanks a lot!

所有跟帖： 

• why wait until the last minute? -大豆腐- ♂ (0 bytes) () 01/30/2008 postreply 07:16:57

• I am changing job (I485 pending 180 in May 2008) -PBEC_slow- ♂ (0 bytes) () 01/30/2008 postreply 07:19:30

• You're fine as long as USCIS has your I-129 before 5/31.- 回複：Whe -pjiang- ♀ (77 bytes) () 01/30/2008 postreply 07:36:12

• Thanks Pjiang, how long does it take to get I129 receipt ? -PBEC_slow- ♂ (0 bytes) () 01/30/2008 postreply 09:17:04