OSCAR last night data being shown under previous night

ChicagoGranny wrote: ↑

Mon Jul 14, 2025 11:16 am

You could try a free account at SleepHQ.com to see if it's more to your liking.
[/quote]


The same thing is happening in SleepHQ. I think this has to do something with time configuration, but I don't understand why this is happening. OSCAR is set to local time zone. The machine is also set to the correct local date and time. Yet the machine's 14th data is appearing on 13th. The 13th date data is appearing under 12th on OSCAR.

The only thing that happened was that initially this machine was set to the local time of Virginia, United States (Eastern Time, GMT-4). Then, I brought the machine to my country where I reset the date and time to the local date and time. My country is 9 hours ahead of the Virginia time. It is GMT +5. This could be related but I can't connect them.

Ahhhh.....you have turned off some sessions to clean it up and get one neater image....I couldn't see that on the first report above and obviously I rarely have a need to turn off any sessions because I rarely have more than one session no matter if I am awake or asleep.

But one thing that I don't understand is that your machine date and OSCAR date are aligned. In the screenshot that you shared, you slept at 9.23 PM on the 13th and woke up 6.30 AM on the 14th, and all of your data is being shown under 13th.

In my case, the machine date is 14th. I went to bed at 4.00 AM on 14th and all of my data is being shown under 13th. Why isn't the machine and OSCAR date the same?

noumdenom wrote: ↑

Mon Jul 14, 2025 3:38 pm

In my case, the machine date is 14th. I went to bed at 4.00 AM on 14th and all of my data is being shown under 13th. Why isn't the machine and OSCAR date the same?

Because to the machine the 14th didn't happen until noon today which is the 14th now since noon has come and gone.
It's working like it always worked with ResMed doing the date reset at Noon. Assuming the calendar date is correct.

Split sessions (or split nights) mess up the reporting. That's part of the reason that OSCAR can't combine sessions easily with ResMed machines.

4 AM on the 14th is still the middle of the night and going to be on the report dated the 13th especially if there is other data/sessions stuck in there.

So, if I started the machine before midnight and slept through, would the machine and calendar date align?

I mean, let's say it is 11. 30 PM on the 13th. So the machine date is 13th because the date at that time is 13th. I start the machine at 11.30 PM and then wake up at 6.00 AM. Now, if I load the SD card back, I would see one single session in OSCAR from 11.30 to 6.00 AM on the calendar day of 13th where the machine date would also be 13th.

Is that correct?

I don't quite understand what you meant by the split session stuff. I am sorry I am new to CPAP therapy.

noumdenom wrote: ↑

Mon Jul 14, 2025 3:55 pm

Is that correct?

should correct things if you do that.
Should be able to even turn off a session (if you have one to spare) without causing a problem but try your experiment tonight if you can.

noumdenom wrote: ↑

Mon Jul 14, 2025 3:55 pm

I don't quite understand what you meant by the split session stuff.

There used to be (years ago and different software) where we could combine split sessions like the stuff that gets recorded after 12 Noon when a new recording date starts and you already have data prior to Noon that has been recorded.
With the way that ResMed does the data recording now it is just too difficult to combine the prior to noon and the after noon data into one report. I wasn't part of the OSCAR development so I don't know what the problem is or was but maybe you inadvertently discovered part of that problem.

Thank you Pugsy. It has been very helpful.