Same feeling here!

I used to be like: "well, this thing will take me at least half a day, it's already 16:00, so I'll better do something quiet to cooldown to the end of the day and tackle this issue tomorrow". I'll leave the office in an regular mood and take the night to get ready for tomorrow.

Now I'm like: "17:30? 30 minutes? I have time to tackle another issue today!" I'll leave the office exhausted and take the night to try and recover from the day I had.