Gembird USER MANUAL User Manual page 18

After the schedule record has been created, click the Apply button
(see Figure #6 above) to save the hardware timer schedule changes.
In case of incorrect entries, these will be highlighted and an error
message will appear. Click the Apply button again after correcting all
the errors
Use Sync button (see Figure #6 above) to synchronize device timer
with PC clock. Note that after synchronization past entries will be
removed from the schedule
HINT: Use the popup menu (see Figure #6 above) which can be
activated by the right mouse button click over the table.
The following are the rules for creating a correct schedule:
The new event time should be in the future
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