(04-07-2020, 11:43 AM)GuyScharf Wrote: OSCAR says "last night" when it means the session starting after noon the previous day and continuing through noon today. "Yesterday" is the day before that.
Yes, I understood the first part of that; the second part is confusing. Again, I'm new to this world, and my brain is still not working, so bear with me...
When I first decided to measure and track my oximetry data, I did so in a cultural vacuum; thus, I had to create my own format to log the data. I, like most people, go to sleep in the evening and then wake in the morning. The "night" straddles two calendar dates. Usually I go to bed before midnight, but other times after midnight - in other words, I may or may not sleep on that first (of the two) calendar date(s), but sleep always occurs during the second calendar date of that sleep period. Also, I would upload and log the data in the morning of that second calendar date. Both functions - sleeping and logging - always occur on that second date and I chose to name and file my data based upon that. "Today's" data is last night's data.
On the other hand, in OSCAR - and perhaps the rest of the sleep science world - last night's data is logged with yesterday's date, whether or not one actually went to sleep "yesterday" or "today". (And I realize I'll have to adjust my data accordingly when I blend the two worlds.)
So, when you say "last night", you mean data logged as "yesterday", but then you add that " 'yesterday' is the day before that". That's very confusing.
When I think of "yesterday", I think of the daytime (awake) period before my last sleep period, e.g., I went to bed "yesterday" and that action began the period of "last night". I.e., "yesterday" has yesterday's date (even if it crept past midnight).
My point, I guess, is more of a question: for the sake of clarity, should we (and OSCAR) even use the term "yesterday"? Rather than "Monday night", or data from "2020-03-30", etc?