Why is my toddler staying up until midnight refusing to sleep?

What people tried

Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.

1. 1
   Kicking daytime naps unless she is clearly tired
2. 2
   Trying to wake her up early and adjust her sleep schedule
3. 3
   Repeatedly attempting to resettle her every 30 minutes to an hour
4. 4
   Letting her cry it out late at night
5. 5
   Trying different routines, sleep hygiene, awake windows, and breastfeeding changes
6. 6
   Experimenting with cosleeping and different rooms or beds
7. 7
   Enrolling the child in daycare to break sleep associations
8. 8
   Letting the child stay awake and accepting challenging behavior

In their words

Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.