As early as humanly possible, and as proximate to the experience as humanly possible. If the time of our interaction was short, then you want to ask before our memory of the experience fades. Many of the people writing your letters are inhumanly busy, and LoRs are a low but recognized priority. Giving a wide time window makes us appreciate you more. But give hard deadlines so we have something to put in our planner.Hi all. When should one start asking for LoRs?