Every family starting daycare asks the same three things in different words: is this normal, what do I actually do, and how long does it last. None of it has a single clean number. All of it has an honest answer.

Search for how long it takes a toddler to adjust to daycare and you will find confident-sounding answers with a number attached. Ignore the number. Every real classroom has children who settle in three days and children who take a full term, in the same room, on the same schedule — because a child's history with separation, their temperament, and the consistency of the room matter more than the calendar.
What is true across almost every family: it gets easier before it gets easy, the crying shortens before it stops, and the version of your child a teacher sees ten minutes after you leave is almost always calmer than the version you saw at the door.
A drop-off script, and the one question to ask the room.
What is ordinary, what is not, and why it can come back.
Why it shows up everywhere, not just at the door.
A routine that holds up, and where the line actually is.
The shape adjustment usually takes, week by week.
The factors that actually move the timeline.