Do you want to offer a lower price for all of your event tickets bought before a specific date? The best way to offer an early bird discount is to use a ticket trigger for dynamic pricing.
To use a ticket trigger for your early bird discount you will need to create two versions of your ticket type in the event setup. The first ticket type at the lower early bird discount price, and the second at the higher regular price.
When you first create your event time or timeslots only select the lower price ticket type to be assigned. This will open up your sales at the early bird discount price.
Then, create a time-based ticket trigger (full details here) for when you want the early bird pricing to end, and the regular pricing to begin. Here are those steps:
Select "Time" as the trigger type
Enter the time that you want the switch to happen. This is set as the number of hours before timeslot sales end.
Select the timeslots you want this to apply to, or have it apply to all timeslots
Add the first action to disable the early bird tickets
Select "Disable"
Check the boxes for the early bird ticket types
Add the second action to enable the regular price tickets
Select "Enable"
Check the boxes for the regular price ticket types
Click the Create Trigger button once you've added the action steps.
Note: You can also manually change the ticket price at any time by editing the ticket type, but that will not be an automated process, like using a ticket trigger.