The calendar on the main pages tells us many things that are currently going on. The Bold option is what is currently going on in camp Half-Blood.

Year - at the start of winter one year will be added.
2000+1= 2001

Season - on the first of each month a new season will start those who go home during winter will leaves sometime in the fall and come then come back in the spring. You can rp at home during this time.
Fall == Winter == Spring == Summer

Event - Its basically what time of day it is, every two days our time will be one event, making one day 16 of our days.
Breakfast == Activity One == Activity Two == Lunch == Activity Three == Free time == Dinner == Cabin Time

Weather- there three lines in weather the first is what the sky looks like. The second is if it raining snowing or sleeting. The final level is the temperature. This will change during the day.
Sunny == Over Cast == Cloudy
Rain == Sleet == Snow
Freezing == Chilly == Moderate == Hot == Scorching