On Sunday, January 24, 2021 at 5:38:04 PM UTC-5, Bob F wrote:
Maybe someone decided not to feed the pilot light all
summer.

No, that wouldn't be it. I do turn off the pilot light in March, according to the printed directions, but I never touch any valves, since they don't come with directions. I'm the only one who handles the boiler aside from the inspection crew; they only come in the fall, and while they sometimes turn on the pilot light and leave it on, they have never turned valves off before now.