By default your start date will be the date you publish your event or team page, but if you’d like to change the date you start calculating donations, you can do that in your event/team Settings.
Log in and head to your event or team page. Select the 'Settings' tab on your left-side dashboard. Scroll down to the 'Page Metrics' section. Next to 'Progress Calculation" you can set the date and time you would like your campaign page to begin displaying your progress. Be sure to click 'Save."
If you would like, you can disable the 'Donate' button on your event or team page until the campaign begins. This is also done through the 'Settings' tab. Scroll down to the 'Event Status' section, the section below 'Page Metrics.' Toggle off the switch to the right of 'Turn Off Donations.' Toggle the switch on when you are ready to start your campaign.