Use Gemini to get a Node-RED inject node that runs every minute M-F during market hours, excluding market holidays.
Navigate to gemini.google.com and enter the following prompt:
write a node red json flow that triggers every minute during market hours and avoiding market holidays
To achieve a flow that triggers every minute while adhering to the US Stock Market schedule (NYSE/NASDAQ), the most efficient way is to use a standard Inject node set to an interval, followed by a Function node that acts as a gatekeeper.
The function logic below specifically accounts for the 2026 market holidays and the standard trading hours (9:30 AM – 4:00 PM ET).
You can import this directly into Node-RED: Click the Hamburger Menu → Import → Paste the code below.
[{"id":"market_timer_inject","type":"inject","z":"637c376f.42c1b8","name":"Every 1 Min","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"60","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"","payloadType":"date","x":140,"y":120,"wires":[["market_hours_filter"]]},{"id":"market_hours_filter","type":"function","z":"637c376f.42c1b8","name":"Market Hours & Holiday Filter","func":"// Set your local timezone adjustment if your server isn't in ET\n// This script uses America/New_York for calculation\nconst now = new Date(new Date().toLocaleString(\"en-US\", {timeZone: \"America/New_York\"}));\n\nconst day = now.getDay(); // 0 = Sunday, 6 = Saturday\nconst hour = now.getHours();\nconst minute = now.getMinutes();\nconst dateString = now.toISOString().split('T')[0]; // YYYY-MM-DD\n\n// 1. Check for Weekends\nif (day === 0 || day === 6) return null;\n\n// 2. Check for 2026 Market Holidays\nconst holidays = [\n \"2026-01-01\", // New Year's\n \"2026-01-19\", // MLK Day\n \"2026-02-16\", // Presidents' Day\n \"2026-04-03\", // Good Friday\n \"2026-05-25\", // Memorial Day\n \"2026-06-19\", // Juneteenth\n \"2026-07-03\", // Independence Day (Observed)\n \"2026-09-07\", // Labor Day\n \"2026-11-26\", // Thanksgiving\n \"2026-12-25\" // Christmas\n];\n\nif (holidays.includes(dateString)) {\n node.status({fill:\"red\",shape:\"dot\",text:\"Market Closed (Holiday)\"});\n return null;\n}\n\n// 3. Check for Early Close (1:00 PM ET)\nconst earlyCloseDays = [\"2026-11-27\", \"2026-12-24\"];\nlet closingHour = 16;\nif (earlyCloseDays.includes(dateString)) {\n closingHour = 13;\n}\n\n// 4. Check for Trading Hours (9:30 AM - 4:00 PM / 1:00 PM)\nconst isAfterOpen = (hour > 9) || (hour === 9 && minute >= 30);\nconst isBeforeClose = (hour < closingHour);\n\nif (isAfterOpen && isBeforeClose) {\n node.status({fill:\"green\",shape:\"dot\",text:\"Market Open\"});\n return msg;\n} else {\n node.status({fill:\"yellow\",shape:\"ring\",text:\"Market Closed (After Hours)\"});\n return null;\n}","outputs":1,"noerr":0,"initialize":"","finalize":"","libs":[],"x":410,"y":120,"wires":[["debug_output"]]},{"id":"debug_output","type":"debug","z":"637c376f.42c1b8","name":"Trigger Event","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":670,"y":120,"wires":[]}]| Component | Description |
|---|---|
| Inject Node | Triggers every 60 seconds. |
| Function Node | This is where the "intelligence" sits. |
| Timezone Correction | It forces the date object to America/New_York so that it works correctly even if your Node-RED server is hosted on a different continent. |
| Weekend Check | Blocks Saturday (6) and Sunday (0). |
| 2026 Holiday List | Specifically filters out the 10 major days the NYSE is closed. |
| Early Closings | It automatically adjusts the closing time to 1:00 PM ET for the day after Thanksgiving and Christmas Eve. |
| Market Window | It only passes the message through if the time is between 9:30 AM and 4:00 PM (or 1:00 PM on early days). |
Pro-Tip: If you want to avoid hardcoding holidays every year, you can install the node-red-contrib-stock-market-clock node or use an API like AbstractAPI or Calendarific to fetch holidays dynamically. However, for a lightweight setup, the hardcoded list above is extremely reliable for 2026.
