If you sighted the moon then its Ramadan so you can go ahead and wish the folks. However its always better to say "Ramadan Mubarak" than "Ramadan Kareem". Cos in Islam its recommend the former. The reason being that its not Ramadan thats "Al Kareem" its Allah.Hope I'm not confusing you more..lol. Anyways yeah its been declared tomorrow's Ramadan so.. Ramadan Mubarak to all my QL friends!!