そろそろ就寝の時間です。パジャマにお着替えしましょうか？ — It's almost time for bed. Shall we change into your pajamas? (Care · Daily · Support, Formal to Senior, JLPT N5)

Gesture & etiquette

Speak softly and calmly; gently indicate the pajamas or changing area; if possible, dim the room lights before approaching to signal the winding-down routine.

そろそろ' (sorosoro = 'soon / gradually') softens the transition to bedtime — it avoids an abrupt announcement and signals the change gradually, which is especially important for seniors who may resist sudden schedule shifts.