Holidays or holiday?

Hmm.. I cannot wait to go on holiday. The summer beach thought is clouding my head now. I want to lie on the beach and watch the waves smashing the beach. Maybe I should plan one for honeymoon. Hehehe.. I should check out montego bay hotels. It would be just the right timing to plan for summer next year. Wait, is it in the north hemisphere or south hemisphere? Oh I just checked, there is no seasons there as it is on equator.

from google

My hands are so dry from washing up dishes. Need to put lotion. Oh yea, my title says holidays or holiday. What is the difference and why do some people put s?