A day is a 24-hour period that begins at the hour designated by the motor carrier. The hour at which the day begins remains constant unless the driver takes a cycle reset. The motor carrier can designate a different 24-hour period (“day”) for different drivers.
For example, one driver’s day might start at midnight while another driver’s day might start at 2:00 am.
Drivers must have one log page per 24-hour period (day).
The “day” remains fixed for the rest of the driver’s cycle. The driver is free to change the start time for the work shift each day however.
See each applied rule set for the daily driving limits and daily on duty limits that a driver can drive and work per day (designated 24-hour period).
Ref: Alberta Motor Transport Association, Alberta Reference Guide for Hours of Service Training Development, June 23, 2008.