Employee Tardiness based off start time

Hello Excel Gurus,

I cant seem to figure out how to track employee tardiness based off of the time they start. Basically I have employees who start at different times throughout the day in 15 minute intervals. They either start: on the hour,15 till,30 till, or 45 till. Now I need a formula that determines whether an employee is late based off their start time.

For example if employee "X" starts at 8:00 AM and clocks in at 8:01 AM. They will be considered late. If they are late then the column titled tardy will display a "Yes" or "No."

Thanks in advance,

See Attachment for sample