Scheduled and worked hours, for analytics and payroll, will always align with the boundaries of the defined business day.
Because the length of a shift or a time punch may span across two business days, a day's total hours may reflect a portion of a shift or as punch.
In the example below, portions of a single shift fall into two different business days:
When approving time punches, Teamwork redundantly shows a shift / punch activity on the the day that the shift / punch crosses into:
Start of Business Day is a Payroll Setting, per Pay-Group: