The 1919 entries for the unit I'm working on are summaries. There is a not a single entry for each day. The dates of the events in the summaries jump around (for example a list of officers leaving with the date they left written next to each). How should I date these summary entries? I have been putting the 1st of the month at the beginning of each month but I'm not sure how helpful this is. Would it better not to date them at all?