
How to calculate elapsed time across midnight
A clock reading identifies a time of day, but a duration needs two dated readings. To calculate elapsed time in an overnight equipment-observation log, write down when the observation began and ended, including the date on each entry. Then count from the start to midnight and from midnight to the documented finish. An earlier-looking finish clock time does not, by itself, tell you which day that finish occurred. For calculate elapsed time , verify each step.










