A quartz oscillator drifts by roughly a second per day. (Edit: Bad math left my underestimating by a few order of magnitude. Whoops.) https://en.wikipedia.org

A quartz oscillator drifts by roughly a second per day. (Edit: Bad math left my underestimating by a few order of magnitude. Whoops.) https://en.wikipedia.org/wiki/Clock_drift https://en.wikipedia.org/wiki/Clock_drift