---
title: Compare Calendar-Day and Rolling-Hour Expiry for a City Pass — Free
description: A two-day pass may mean two calendar dates or forty-eight rolling hours. Model both stated conventions beside a proposed visit so the activation time cannot hide a different expiry boundary.
category: travel
last_verified: 2026-09-30
freshness: green
published: 2026-09-30
canonical_url: https://gratis-ai.pages.dev/articles/city-pass-validity-rule-compare.html
companion_app_url: https://gratis-ai.pages.dev/apps/city-pass-validity-rule-compare.html
reading_time_minutes: 9
tags: travel, passvalidity, local-first, explicit-assumptions, no-account
---

# Compare Calendar-Day and Rolling-Hour Expiry for a City Pass — Free

A two-day pass may mean two calendar dates or forty-eight rolling hours. Model both stated conventions beside a proposed visit so the activation time cannot hide a different expiry boundary.

**Free and complete.** This guide is a standalone free tool — no account, no card, anywhere. The only paid option is one optional extra outcome: $4 one-time. Nothing in the free tier is gated.

## Who it's for

Travelers comparing two explicit hypothetical pass-validity conventions

## What's free

- one complete unwatermarked validity-window stub run in the app
- three labeled samples and unlimited article-demo calculations
- complete result text and a user-triggered input-state link

## Optional paid add-on

**$4 one-time.**

- unlimited subsequent validity-window stub app calculations after a local convenience signal
- print the validity-window stub with visible assumptions and its safety boundary
- CSV of the displayed visits with different window results and row workings; conditional estimate uses your manual-retyping minutes
- five local reading summaries (headline/count/time), not saved full inputs or cross-device backups

## Sources & verification

- Tool: GratisAI local-first instrument (no key, no account)
- Primary source: the free tool itself (local-first, no external dependency)
- Last verification: 2026-09-30 (green)

## Use it

- Interactive guide: https://gratis-ai.pages.dev/articles/city-pass-validity-rule-compare.html
- Companion app: https://gratis-ai.pages.dev/apps/city-pass-validity-rule-compare.html
- This machine-readable mirror: /mirrors/city-pass-validity-rule-compare.md

*Generated free at https://gratis-ai.pages.dev/articles/city-pass-validity-rule-compare.html — every guide on GratisAI is a complete, working tool. $0, no account, no card, anywhere.*