Fun fact: GPS uses 10 bits to store the week. That means it runs out... oh heck – April 6, 2019
Found on The Register on Thursday, 14 February 2019
GPS signals from satellites include a timestamp, needed in part to calculate one's location, that stores the week number using ten binary bits.
Every 1,024 weeks, or roughly every 20 years, the counter rolls over from 1,023 to zero.
For devices unprepared for the counter overflow, a firmware upgrade will be necessary to keep the things working properly.
It's not like bits are very expensive. They could have used 12, or better 16 bits and be on the safe side; but no, they decided to make the timeframe short instead.