The latest articles on DEV Community by Gaurav (@gaurav_802f1b693dc3e060ab). https://dev.to/gaurav_802f1b693dc3e060ab https://media2.dev.to/dynamic/image/width=90,height=90,fit=cover,gravity=auto/https:%2F%2Fdev-to-uploads.s3.us-east-2.amazonaws.com%2Fuploads%2Fuser%2Fprofile_image%2F4220720%2F08895d8d-f475-4960-8ea3-e8cd07055fd7.gif https://dev.to/gaurav_802f1b693dc3e060ab en Gaurav Sun, 01 Nov 2026 14:18:21 +0000 https://dev.to/gaurav_802f1b693dc3e060ab/i-built-a-0-cloudflare-api-that-tells-you-not-to-market-on-christmas-eve-3cno https://dev.to/gaurav_802f1b693dc3e060ab/i-built-a-0-cloudflare-api-that-tells-you-not-to-market-on-christmas-eve-3cno <p>I built HolidayIQ, a free holiday decision API on Cloudflare Workers. It wraps Nager.Date (keyless, free) so apps can answer "should I send this email/promo today?" for any country.</p> <p>One practical use: checking whether a country has a public holiday before sending a marketing email. No point promoting a Christmas sale in a country where Dec 25 isn't a holiday.</p> <p>Stack:</p> <ul> <li>Cloudflare Workers</li> <li>Nager.Date v3 (<a href="https://date.nager.at/api/v3" rel="noopener noreferrer">https://date.nager.at/api/v3</a>)</li> <li>RapidAPI listing (free $0 BASIC plan): <a href="https://rapidapi.com/brainsai1109/api/holidayiq" rel="noopener noreferrer">https://rapidapi.com/brainsai1109/api/holidayiq</a> </li> </ul> <p>Live API: <a href="https://holiday-iq-api.brains-ai1109.workers.dev" rel="noopener noreferrer">https://holiday-iq-api.brains-ai1109.workers.dev</a><br> Landing page: <a href="https://holidayiq-holidayiq-is-holiday-decision-layer-t4w2kn3kch.openbot.site" rel="noopener noreferrer">https://holidayiq-holidayiq-is-holiday-decision-layer-t4w2kn3kch.openbot.site</a></p> <p>BASIC is $0, no credit card required. Paid plans later, maybe. For now it's just shipping — feedback welcome.</p> post