Sunrise Windows
A calendar that overlays real local sunrise and sunset times onto every event so people planning outdoor activities, photo shoots, runs, or commutes can see exactly how much usable daylight they have — and what changes if DST goes away.
Outdoor enthusiasts, photographers, runners, and early-shift workers planning around daylight
- Daylight bars on each calendar event showing golden-hour, blue-hour, and usable-light windows",""What if we go permanent DST?" toggle that recomputes every event in the calendar
- Weekly digest: "This week you lose 12 minutes of evening light"
The Sunshine Protection Act coverage is making daylight math a mainstream conversation — the same data photographers and runners have quietly relied on is now newsworthy.
Sun times draw steady but niche interest; multiple free tools (timeanddate.com, sunrisesunset.com) and photographer apps already serve the core query, so demand is real but splintered across existing free options.Sunrise & Sunset in Kitchener | Daily, Monthly & Yearly Data ↗Sunrise and sunset times in Kitchener - timeanddate.com ↗
Direct competitor Sunrise Times already creates calendar events with sunrise/sunset/twilight (free); TPE and GoldenHour.fyi dominate the photographer segment; idea lacks a clear differentiation beyond overlay on existing events.Sunrise Times | Sunrise Times App ↗GoldenHour — Chase the Perfect Light ↗
Willingness to pay is weak — most sunrise/sunset and golden hour apps are free or priced at $1.99–$10 lifetime; sun data is freely available via NOAA/sunrise-sunset.org, so monetization ceiling is low without a strong niche wedge.GoldenHour — Chase the Perfect Light ↗TPE (The Photographer's Ephemeris) ↗
Sunrise/sunset data is eternal and DST debate (Sunshine Protection Act passed House 308-117) keeps it in news, but the legislative fight could resolve either way; core daylight-planning use case persists regardless.House Passes Legislation to Make Daylight Saving Time Permanent ↗Sunshine Protection Act - Wikipedia ↗
Trivial to build: public sunrise/sunset APIs (sunrise-sunset.org, NOAA) plus EventKit/Google Calendar APIs make an overlay layer a weekend project.Sunrise Times | Sunrise Times App ↗