Inday
Public holiday API for 100+ countries, built for developers
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gökhan ibrikçi

Inday - Public holiday API for 100+ countries, built for developers

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Inday is a simple REST API that gives you public holiday and working day data for 100+ countries. Whether you're building HR software, a scheduling tool, or a financial app — Inday has you covered. 🗓 What you can do: • Get public holidays by country & year • Calculate working days between two dates • Check if a specific date is a holiday • Access via REST API or MCP (for AI agents) ⚡ Developer-friendly — simple auth, JSON responses, free tier included.

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gökhan ibrikçi
Maker
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Hey Product Hunt! 👋 I'm Gökhan, the maker of Inday. I built this because I kept running into the same problem: every project involving scheduling, HR, or finance needed holiday data — and there was no simple, affordable API for it. Inday solves that. One API call, accurate public holiday data for 100+ countries. I'd love your feedback: • Which countries or features matter most to you? • Is the free tier (1,000 req/month) enough to get started? • Anything missing from the docs? Happy to answer any questions! 🙌
Ervin Onur

I've been using this for some experimental side projects and loving it so far. Now thinking about integrating it into the commercial products i'm working on with a premium plan. With this i'll have one less thing to worry about while writing code. Thanks for sharing this with us devs guys!

gökhan ibrikçi
Maker

@ervin_onur Really glad to hear that! 🚀
It’s awesome that you’re considering using it in your commercial products. That’s exactly the kind of impact we aim for—reducing those cross-cutting concerns so you can focus on building. Let us know if you need anything along the way!

Ünal Uslusoy

Congrats on the launch, Gökhan! 🚀 As a backend developer working with PHP/Symfony, I constantly deal with scheduling and date calculations for e-commerce and ERP integrations. Having a reliable, developer-friendly holiday API like Inday would save so much time instead of maintaining custom holiday tables per country. The working days calculation endpoint is a killer feature — super useful for delivery date estimations and SLA tracking. Great work, looking forward to seeing it grow!

gökhan ibrikçi
Maker

@unaluslusoy Thanks a lot for the kind words! 🙏

Really glad to hear it resonates with your use case — especially around scheduling and SLA calculations, which we know can get pretty tricky across different regions.

That’s exactly the problem we aimed to solve with Inday: removing the need for maintaining custom holiday datasets and making working-day calculations straightforward and reliable.

Love that you pointed out the working days endpoint — we’re planning to expand it further with more flexibility based on real-world use cases like yours.

Appreciate the support🚀