I'm positive "Thirsty Thursday" has a different connotation now; maybe don't search that at work.

But, we'll keep things PG here! Probably. From 1975, Superman #293, "The Miracle of Thirsty Thursday!" Written by Elliot S! Maggin, pencils by Curt Swan, inks by Bob Oksner; with a classic 'Super-Dickery' cover by Oksner.

This tied into a theme Maggin would use a few times, up to the Miracle Monday novel: historians from the future would visit the present every so often, and of course get tangled up in Superman events. Historian Joann Jaime was going back from 3475 to August 21, 1975...which isn't a Thursday this year, but close! Joann wants to see if she can verify the "miracle of Thirsty Thursday," which she didn't think had anything to do with Superman; her superior is like yeah, sure it doesn't.

In the present, Superman stops a fire, saving a small child; then heads back to WGBS, where Joann had already managed to get inside, pretending to let Steve Lombard pick her up. She refuses to let Steve prank Clark by tying his shoes together: Joann knew he was Superman, and uses a hidden device to swap Clark and Steve's shoes, which feels like would that would be confusing to explain away. Still, on a live feed, as the firefighters are putting out the remains of the apartment fire, they suddenly become afraid of their hoses, dropping them and leaving the fire to surge again. Could this be the result of a S.T.A.R. Labs scientist's accident, that had turned him into a wild man? While he was roaming the streets, others, including Lois, are also repulsed by water; and the city's hotels are fuller than hell, of time-travellers stopping by to catch this!

After putting the fire out for good, Superman stops to talk to Lois, but is immediately attacked by the scientist, whom he recognizes. Listening in back at the lab, Superman hears that the scientist had accidentally released an airborne serum that caused aquaphobia, and then drove himself crazy with the wrong cure: the only cure was for the victim to either be kept hyperactive, or completely rested, for an entire day. Meanwhile, Joann has to stop a fellow historian, from trying to force water down a kid's throat to save them: no changing history, no exceptions. Superman uses heat vision, to puncture cannisters of sleeping gas stored beneath the city...stored beneath the city for why? Well, all the citizens are knocked out, except the scientist, who Superman has to tussle with for a full day.

The next day, everyone wakes up, none the worse for wear, except thirsty. The scientist is cured, but Superman tells both him and his boss (who had the sleeping gas? Like a lot of it?) what had happened but swears them to secrecy. The assorted historians who had visited had also been knocked out, so both they and Joann still have no explanation for what had happened, except a miracle. She still doesn't think it was Superman-related, but does consider him the greatest miracle of the era.