I am not sure which 24 hours was the craziest one, but I will pick 2.

This one happened just a few weeks after I started working for the one and only company I have ever worked for. The huge-ass multi-tenant website stopped working. There was out of memory exception and nobody knew what is going on. I was still very new and knew shit about how it worked + plus my PHP knowledge was limited back then. Everyone was looking for the culprit but with no luck. Then the next day I finally managed to find a fucking infinite loop in our weather plugin.

We were working on a moderately big project for a client. There was a lot of work lately (on different projects) and we were *very* behind schedule on this one. Deadline? You guessed it - tomorrow. What was worse is that we couldnt move it any further, becuase we already did once before. So I had to work for about 20 hours straight to kinda finish the work. Worst part? Client turned out to be moron and half-scammer, so they are not our client anymore and the project was never deployed to production. Never again.