Can you keep a secret

Tomorrow is my big brothers 60th Birthday.He has flown over to stay with his partners family before he flys off on holiday on Monday.
As i have mentioned before i only found my brother 3 years ago after years of searching.He is my late dads only child from his 1st marriage and for reasons which we both don't have the answers to my dad lost contact with him.
It turns out when i found him that his partners cousin lives a 10 minute walk from my house and my DD used to catch the same school bus as one of their relations.Small world....
Well we have been invited to his surprise party so if you see him please don't tell him as we don't want to spoil the surprise.