Stone Calendar (Spring)

If it is March, any time a player flips a coin, on
tails Stone Calendar (Spring) deals one damage
to each creature their opponents' control; any
time a player rolls a die, that player gains life
equal to the value of the roll.
If it is April, all permanents from "un-" sets have indestructible. (This includes proxy cards printed
from "un-" sets printed by Jason.)
If it is May, all rabbits have "{t}: Populate".