Remote MCP connector

Holiday Calendar (example) by Modern Mustard Seed

U.S. federal holidays with their observed dates, and business-day math that skips weekends and holidays. Add it to Claude as a custom connector and ask a date question.

Ask Claude

• “Which federal holidays fall on a weekend in 2027, and which days are they observed instead?”
• “An invoice dated 2026-11-20 is due in 10 business days. What date is that, and which holidays did you skip?”
• “How many business days are there between 2026-12-01 and 2027-01-15?”

Read the documentation. This connector is the worked example in the open-source Small Business MCP Starter Kit by Modern Mustard Seed.