IStock Photo 11659423 © kzenon

By just about any count you can find, Christianity is the largest religion in the world. Adherents.com figures there are about 2.1 billion Christians on the planet, counting all the myriad denominations. Other estimates put the total somewhat lower, but they don't challenge the number one status, population-wise, of the faith founded on the teachings of that humble Jewish preacher two thousand years ago.

So if you're celebrating Easter Sunday with a family dinner, Easter egg hunts and bunnies, or maybe even going to church, you're in massive company.

In the US, the odds an adult celebrates Easter are 1 in 1.27(79%)—not as high as the 1 in 1.1 (91%) odds of celebrating Christmas but pretty impressive nonetheless. More women (1 in 1.2—83%) celebrate Easter than men (1 in 1.35—74%). But what does "celebrate" mean? Here's what Americans are actually doing to mark the holiday that 1 in 2.17 adults considers one of the nation's most important:

• Going to church is pretty popular: 1 in 1.79 adults (56%) will plan to attend an Easter service.

• Eating an Easter meal with the family is even more common: the odds an adult will plan to have a family meal to celebrate Easter—with or without jellybeans for dessert—are 1 in 1.39 (72%).

• Just 1 in 2.5 adults will plan to have an Easter egg hunt to celebrate the holiday, likely reflecting the fact that not all Easter-observing adults live in a household with young children. Still, that's a lot of eggs and coloring. Variations on the Easter egg tradition abound, from souvenir wooden White House Easter Egg Roll eggs to the intricate techniques and designs of Ukrainian pysanky, and from giant British 30-kilogram eggs to ouef coquille—real hen's eggs filled, by some miraculous-seeming method, with chocolate ganache.