Hello! Is it better to say ‘wish u the best 20.’ or ‘wish u the best 20th.’ ?

Question

Hello! Is it better to say ‘wish u the best 20.’ or ‘wish u the best 20th.’  ?

Answer

Is the context that your friend is having a 20th birthday? If so, we could say, I wish you the best on your 20th (birthday) or I hope you have a great 20th (birthday).

Answer

I agree with Peter. You can also say 'I wish you all the best on your 20th' or 'Wishing you (all) the best on your 20th'.