er... dates? Guessing that you meant to write "calendar" (that thing with pages showing months and days), I'd have to say the answer is "dates."
After his engine failed, bart was stranded in the dark. The pack was stranded on a desert island. Jamal did not mind being stranded on a deserted isle as long as his best friend Spalding was there with him. The stranded team tried to get themselves rescued.
I was stranded on a desert island
The man was stranded on the desert island.
yes
Phillip and Timothy were on the island for many months until Phillip was rescued.
Sienna Miller
Simple. Let the water heat in the light of the sun. It's a desert island.
on a desert island for oodles
Well, it sorta depends on what island your on, what day was it, and when you got there. You could always look at the sun and shadow for time. weather for month and things you found on the island for what year.
Play with each other.
Gilligan's Island
The most popular luxury item chosen on Desert Island Discs is a piano or a musical instrument. Many guests select this item to keep them entertained and uplifted while stranded on the desert island.