It is an official non-working day, often part of a week-long "holiday break" (Novogodniye kanikuly). 2. Default System Date

After a total memory loss or long-term power failure, the internal real-time clock (TOD) often resets to 01-Jan-90 .

In technical systems and legacy hardware, January 1st often serves as a "base" or "reset" date:

"01.янв" is the common Russian abbreviation for . Depending on your context, a "write-up" for this date typically refers to one of the following scenarios: 1. New Year's Day (Public Holiday)