Is there a Time Standard in programming that actually goes down?

[drunkenHiker]

Hi. I've been working on my custom app that works works with my Casio watch over BLE.
I've intercepted the data and it turns out that bytes are actually DESCENDING with time.

7e 19 f8 fa f1 f5 d3 f8 
7e 19 f8 fa f1 f5 d2 d6
7e 19 f8 fa f1 f5 d1 cd

Those three data points were taken one after another, approx. one minute apart, the last on the list was also the last in real time.
I know for a fact that the watch adds new data at the end of the block.

Notice that those number are descending!

Do you know of any standard that would fit it? I have no idea how to decode it.