On the search screen, tap Dates and Duration. You get two modes:
Specific dates: Open one to see your flights and how many nights you get, then search — every deal is priced for those exact days.
Flexible: Not tied to a specific date? Switch to Flexible. Set a window you could travel in and how long you want to stay, then search. RatePunk checks every date combination so you can see which days are cheapest.
Tip: Flights on weekdays, especially Tuesdays and Wednesdays, are often cheaper than weekend departures.