HolidayStacks Public Beta. We are actively building! Last code push: 12 Apr 2026. We'd love your feedback.
The Algorithm of Rest

Turn 28 days of annual leave into 69 days of freedom.

Feed the engine your annual leave allowance and let the algorithm mathematically hack your calendar for the maximum possible days out of the office. No account required.

The Engine

How many days off can you take?

Tell us your total yearly holiday leave allowance. We'll find the best way to spend it.

28

You put in the days. We hack the math.

What is a holiday optimiser? A holiday optimiser is a calculator that overlays your local public bank holidays onto standard weekends to find the longest possible unbroken streaks of time off using the absolute fewest days of annual leave.

Local Bank Holidays

We automatically overlay your regional bank holidays to act as free PTO multipliers.

100% Private Engine

Code execution happens entirely in your browser window. Zero Google Calendar syncing required.

Export & Share

Instantly download a PDF summary for HR or sync the whole year directly to your calendar.