That's not news
Developers invent their own timescales all the time. For example I once made a Unix-epoch clone starting at the year 2000. IBM-PCs calculated the time in 1/18.2065 Hz intervalls, making an overflow of the 16-Bit Number roughly every 3600 seconds.
On 16-Bit systems it's common to count seconds of the week, because that nicely fits in a 16 Bit number.