Nikon Z 7 Reference Manual page 236

Interval Timer Photography
D
Before Shooting
Before beginning interval timer photography, take a test shot at
current settings and view the results. We recommend using a tripod
and selecting Off for Vibration reduction in the photo shooting
menu. Before choosing a starting time, select Time zone and date in
the setup menu and make sure that the camera clock is set to the
correct time and date. To ensure that shooting is not interrupted, be
sure the camera battery is fully charged. If in doubt, charge the battery
before use or use an AC adapter and power connector (available
separately).
1
Select Interval timer shooting.
Highlight Interval timer shooting in
the photo shooting menu and press 2.
Interval timer shooting options will
be displayed.
212 Menu Guide > C The Photo Shooting Menu