date-fns Connector for AI agents.

Q: Does it handle Daylight Savings Time?

Yes! Because it leverages date-fns-tz.

4 live capabilities

Get 100% accurate calendar math and timezone conversions for your apps.

Live agent request date-fns / Connector

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AI Agent

Why people use date-fns

Date Utils Engine: Fixing Calendar Math Hallucinations

This Connector takes that guesswork out of the equation. It treats dates as math problems rather than text patterns. You get the right answer every time, which means you can trust your agent's output without a manual audit.

What Vinkius changes

Your agent stops guessing and starts calculating with 100% reliability.

Use it from Claude, ChatGPT, Cursor or another AI client you already have.

One account · 6,100+ Connectors

Real-world use case 01

Subscription renewal calculations

A developer needs to calculate a 90-day subscription renewal date accurately, accounting for months with different lengths.
Real-world use case 02

Global flight time conversion

A travel app needs to convert a flight time from UTC to local time for a user in London while handling DST.
Real-world use case 03

Leap year deadline tracking

A manager wants to know exactly how many days are left until a project deadline that falls in a leap year.

Complete set · 4capabilities

The complete date-fns capability set.

These are the exact actions your AI can choose when you ask it to work with date-fns.

Capability set01 / 01

01—04

4 capabilities in this set.

Part of 4 available through date-fns.

01 Capability
Parse date
Turn messy date strings into confirmed valid date objects. This ensures your agent doesn't try to process broken or impossible dates.
02 Capability
To timezone
Convert UTC dates to specific timezones like America/Sao_Paulo, including DST. This handles all the complex offset rules automatically.
03 Capability
Diff dates
Get the exact number of days, hours, and minutes between two dates. It helps you calculate precise durations without rounding errors.
04 Capability
Add days
Add or subtract a specific number of calendar days from any starting date. It guarantees the correct result even when crossing month boundaries.

Set up in minutes

One URL. Then ask date-fns to work.

Claude and ChatGPT only need the Connector URL. Copy it once, add it in settings, and use date-fns from the conversation.

Choose your client

Live preview

Advanced clients IDE · CLI

Claude · Web + desktop

Official guide ↗

Connector URL · ready to paste

Streamable HTTP

https://edge.vinkius.com/vk_preview_Fk1oPI7PaSa214SBSvwr4zJFyEsZvuH3cTjwLYio/mcp

Step 01

Open Connectors

In Claude Web or Claude Desktop, open Settings and choose Connectors.
Step 02

Add the URL

Choose Add custom connector, name it date-fns, and paste the URL above.
Step 03

Turn it on in chat

Select +, open Connectors, and enable date-fns for the conversation.

ChatGPT · Web + desktop

Official guide ↗

Connector URL · ready to paste

Streamable HTTP

https://edge.vinkius.com/vk_preview_Fk1oPI7PaSa214SBSvwr4zJFyEsZvuH3cTjwLYio/mcp

Step 01

Open MCP settings

On desktop, open Settings and MCP servers. On web, open your workspace app or connector settings.
Step 02

Add the URL

Choose Add server with Streamable HTTP, or create a custom MCP app, then paste the date-fns URL.
Step 03

Save and start

Save the connection and enable date-fns in your conversation. Desktop may ask you to restart once.

Cursor · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "date-utils-engine": {
      "url": "https://edge.vinkius.com/vk_preview_Fk1oPI7PaSa214SBSvwr4zJFyEsZvuH3cTjwLYio/mcp"
    }
  }
}

Step 01

Open MCP Settings

Press Cmd+Shift+P (macOS) or Ctrl+Shift+P (Windows/Linux) → search "MCP Settings"
Step 02

Add the server config

Paste the JSON configuration above into the mcp.json file that opens
Step 03

Save the file

Cursor will automatically detect the new Connector
Step 04

Start using date-fns

Open Agent mode in chat and ask: "Using date-fns, help me...". 4 tools available

VS Code Copilot · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "date-utils-engine": {
      "url": "https://edge.vinkius.com/vk_preview_Fk1oPI7PaSa214SBSvwr4zJFyEsZvuH3cTjwLYio/mcp"
    }
  }
}

Step 01

Create MCP config

Create a .vscode/mcp.json file in your project root
Step 02

Add the server config

Paste the JSON configuration above
Step 03

Enable Agent mode

Open GitHub Copilot Chat and switch to Agent mode using the dropdown
Step 04

Start using date-fns

Ask Copilot: "Using date-fns, help me...". 4 tools available

Windsurf · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "date-utils-engine": {
      "url": "https://edge.vinkius.com/vk_preview_Fk1oPI7PaSa214SBSvwr4zJFyEsZvuH3cTjwLYio/mcp"
    }
  }
}

Step 01

Open MCP Settings

Go to Settings → MCP Configuration or press Cmd+Shift+P and search "MCP"
Step 02

Add the server

Paste the JSON configuration above into mcp_config.json
Step 03

Save and reload

Windsurf will detect the new server automatically
Step 04

Start using date-fns

Open Cascade and ask: "Using date-fns, help me...". 4 tools available

Cline · IDE configuration

Official guide ↗

Advanced setup

{
  "mcpServers": {
    "date-utils-engine": {
      "url": "https://edge.vinkius.com/vk_preview_Fk1oPI7PaSa214SBSvwr4zJFyEsZvuH3cTjwLYio/mcp"
    }
  }
}

Step 01

Open Cline MCP Settings

Click the Connectors icon in the Cline sidebar panel
Step 02

Add remote server

Click "Add Connector" and paste the configuration above
Step 03

Enable the server

Toggle the server switch to ON
Step 04

Start using date-fns

Ask Cline: "Using date-fns, help me...". 4 tools available

Claude Code · Terminal command

Official guide ↗

Advanced setup

claude mcp add date-utils-engine --transport http "https://edge.vinkius.com/vk_preview_Fk1oPI7PaSa214SBSvwr4zJFyEsZvuH3cTjwLYio/mcp"

Step 01

Install Claude Code

Run npm install -g @anthropic-ai/claude-code if not already installed
Step 02

Add the Connector

Run the command above in your terminal
Step 03

Verify the connection

Run claude mcp to list connected servers, or type /mcp inside a session
Step 04

Start using date-fns

Ask Claude: "Using date-fns, show me...". 4 tools are ready

Where the request belongs

Work date-fns can move forward.

Built around the request

Developers building scheduling apps, project managers tracking complex deadlines, or anyone who needs precise timezone math without manual checking.

Full-stack Developer

Building a booking system where leap years and DST shifts break the user interface.

Operations Manager

Calculating project milestones across multiple global timezones for international teams.

Data Analyst

Cleaning up messy date strings from different regions into a standard, reliable format.

Build the capability set

Each Connector adds new actions and data without changing how you work.

Browse Connectors

01 3 capabilities

Deterministic Datetime Engine

Equip your AI with exact temporal math. Deterministically calculate date differences, leap years, and add business days (skipping weekends) 100% locally.

View Connector

02 3 capabilities

Days Between Dates Calculator

Calculate precise intervals between two dates in years, months, weeks, and days.

View Connector

03 4 capabilities

Absolute Chronological Timeline Engine

Empower your AI Agent with deterministic chronological precision. Calculate exact ages, compare lifespans, forecast milestones, and track anniversaries. all offline and hallucination-free.

View Connector

04 1 capability

Cron Expression Calculator

Calculate the exact future dates of any Cron expression using deterministic JavaScript. Stop LLMs from failing date mathematics and leap year edge cases.

View Connector

05 3 capabilities

Calendar Converter

Convert dates between 15+ calendar systems including Gregorian, Chinese, Persian, and Japanese Era.

View Connector

06 1 capability

Legal Deadline Calculator Engine

Compute rigorous procedural deadlines in business days without risking LLM mathematical hallucination.

View Connector

Bring your own AI

Change the model, client or framework. Keep date-fns connected.

Claude
ChatGPT
Gemini
Cursor
VS Code
Windsurf
ZCode
Cline
Zed
Continue
Kiro
Roo Code
Zencoder
Goose
Void
Augment Code
Amp
Qodo
Tabnine
Pieces
Sourcegraph Cody
JetBrains
Warp
Amazon Q
Antigravity
BoltAI
Raycast
Jan
LM Studio
AnythingLLM
Open WebUI
Msty
Cherry Studio
LibreChat
TypingMind
Chorus
5ire
n8n
LangChain
LlamaIndex
CrewAI
Vercel AI SDK

Before you connect

Questions about date-fns.

The practical details behind the request, access and result.

Does Date Utils Engine handle leap years?

Yes, it uses the date-fns engine to ensure leap years are always calculated correctly.

Can Date Utils Engine convert to any timezone?

It supports all IANA timezone identifiers, including those with complex daylight savings rules.

Is Date Utils Engine fast?

Yes, it runs as native V8 javascript locally, so there's no network latency or delay.

Will Date Utils Engine stop my AI from making mistakes?

It removes the AI's need to do the math, which is where most date errors happen.

Does Date Utils Engine need an API key?

No, it doesn't rely on external services, so you don't need to manage extra keys.

Does it handle Daylight Savings Time?

Yes! Because it leverages date-fns-tz.

Can it calculate exact differences?

Yes, it returns the exact calendar days between two dates.

Does it support leap years?

Yes, leap years are evaluated natively.

One connection away

Give your agent a direct line to date-fns.

Connect date-fns once. Keep it beside 6,100+ managed Connectors when the next task needs more.

Explore every Connector No credit card required · Free tier available

Date Utils Engine: Fixing Calendar Math Hallucinations

Your agent stops guessing and starts calculating with 100% reliability.

Subscription renewal calculations

Global flight time conversion

Leap year deadline tracking

Parse date

To timezone

Diff dates

Add days

Open Connectors

Add the URL

Turn it on in chat

Open MCP settings

Add the URL

Save and start

Open MCP Settings

Add the server config

Save the file

Start using date-fns

Create MCP config

Add the server config

Enable Agent mode

Start using date-fns

Open MCP Settings

Add the server

Save and reload

Start using date-fns

Open Cline MCP Settings

Add remote server

Enable the server

Start using date-fns

Install Claude Code

Add the Connector

Verify the connection

Start using date-fns

Full-stack Developer

Operations Manager

Data Analyst

Deterministic Datetime Engine

Days Between Dates Calculator

Absolute Chronological Timeline Engine

Cron Expression Calculator

Calendar Converter

Legal Deadline Calculator Engine

Give your agent a direct line to date-fns.