Can i celebrate my 21st bdae?

i still haven decide to celebrate my bdae due to ns,
bcause don have enough time to prepare. So
im still considering oh, no worries guys, i'll give
at 2wks invitation notice to u guys.
If i do celebrate, must feel free to attend ok? =)
See you guys soon.

18 more days to POP.
Everyone pls note, i'll be going out field training
tml, so i wont be able to make any phone calls nor
reply msg due to we're nt allow to bring our phone.