Yes! There is great way to adjust your hours within the within the Partner Dashboard! You can manage your normal AND your special store hours from within the Business Locations tab.
1) Log in to your Postmates Dashboard with your username and password.
2) Select the location you wish to edit.
3) Scroll down to the "HOURS" Section
4) Select the day(s) you wish to edit, and adjust the hours to your preference, and press "SAVE"
Below is a video demonstration that illustrates the process.