Next Tuesday, of course, is April 1st, better known as, duh, April Fools Day. Which has been a day of some tomfoolery played on listeners of Nevada City community radio station KVMR 89.5 FM over the years. It didn’t fool Nevada City poet Molly Fisk, who was a telephone guest on the rerun show from her Marin County home — before she had ever visited here. In fact, one midwife showed up to help out, only to discover it was an April Fools joke. No Foolin’, Two SpecialsAt least two shows will be treats, not tricks, on April Fools Day next Tuesday.