Seventeen months doesn't get its own chapter in most parenting books — but your toddler is changing rapidly. The language explosion is in full swing, and with language comes a new form of bedtime resistance: words. Where they used to just cry, they now articulate. "No bed!" "More play!" "Not tired!" It's harder to resist a protest when it comes with vocabulary.
The schedule itself hasn't changed from 16 months — one midday nap, consistent wake windows, predictable bedtime. This stability is your anchor. The toddler personality will test the boundaries, but the boundaries themselves remain the same. Consistency in the face of verbal protest is the skill of this month.
Your toddler's imagination is also developing, which is wonderful during the day (pretend cooking, stuffed animal conversations) but can introduce the first hints of nighttime unease. Full nighttime fears usually don't emerge until 18 to 24 months, but some 17-month-olds may show early signs of not wanting to be alone in the dark.