Daylight saving time
Some clock-shift problems could be avoided by adjusting clocks continuously or at least more gradually--for example, Willett at first suggested weekly 20-minute transitions--but this would add complexity and has never been implemented.
Willett's first suggestion was to change clocks by 20 minutes how often?
weekly
Some clock-shift problems could be avoided by adjusting clocks continuously or at least more gradually--for example, Willett at first suggested weekly 20-minute transitions--but this would add complexity and has never been implemented.
clocks