Online alarm clock for 12:23 am
While you are preparing for kiwi watching at Zealandia, set the 12:23 am alarm before packing the last few things you will need. That leaves a clear checkpoint ahead of 1:00 am, so you can finish getting ready without repeatedly checking the clock or losing track of when you meant to move.
Your Zealandia preparation may take you into another app while this alarm page sits in the background. Some browsers reduce activity on pages that are no longer visible, which can affect timing or sound. Check that the alarm remains armed after switching back, and leave the sound volume high enough to notice. For the kiwi outing, the alert will not sound if you end the browser session or let the computer go to sleep.
Because 12:23 am falls deep into the night, decide beforehand what happens after the alarm and keep that task brief. Put anything needed for the kiwi visit together earlier, then use the alert only as the cue to get up or make a final check. Once that moment has passed, avoid adding extra jobs; returning promptly to bed preserves more of the sleep still available before morning.