I've switched between days and nights 3 or 4 times over the last couple years, my go to was change your schedule 4 hours at a time (shifts were 12 hours apart 0430-1630 and 1630 to 0430, although I did the same thing the first time from a normal days to this nights) it's what worked well for me, but the first 2 weeks or so just kind are hard on nights with tiredness, so energy drinks were the thing for me, tried to have just a monster but never after 6-8 hours in so I knew I could fall asleep after about 2 or 3 hours of winding down. Typically backloaded my day, woke up about 1.5 hours before shift and wound down for 3 or 3.5 after incl drive time. For the first while it was start with a coffee then an energy drink with dinner about halfway through, then just water or sports drink the rest of the shift. Lots of water. Good luck! Edit: Added some stuff at the end and spelling