keep (someone) posted

Library

We will keep you posted by 13:30.
general
держать в курсе
Сообщать кому-либо новости по мере развития ситуации.
The Thirteen-Minute Problem
A complete fictional city-visit case combining traveler constraints, an original itinerary, an early-closure notice, venue cards, a schematic map, a replanning dialogue, two defensible schedules and a final group confirmation.