For developers and AI agents

The date calculations behind this site are published as public Apify Actors: send JSON in, get dated JSON out, with GOV.UK sources. They are general information, not legal advice.

Actors

• England PRS registration deadline Registration opening date and deadline for any England postcode or region, in bulk.
• UK Renters' Rights dates Earliest section 13 rent increase date and the 28-day pet request deadline.
• UK late payment interest Statutory interest, compensation and totals on a late business invoice.
• UK working days Add or count UK working days, bank holidays and court time limits.
• UK business deadlines Companies House, Corporation Tax, VAT, Self Assessment and MTD deadlines from a date.
• UK MTD Income Tax threshold checker Does Making Tax Digital for Income Tax apply, and from when.
• UK tax year and week helper UK tax year, tax week and tax month labels and boundaries for a batch of dates.
• UK identifier checker Format and check-digit tests for MPAN, VAT, NINO, NHS, IBAN, LEI and more, in bulk.
• ICS calendar validator Validate .ics calendar files and feeds against RFC 5545, with line numbers.
• Dataset format converter Turn an Apify dataset or JSON list into CSV, JSON Lines, SQL scripts and iCalendar.

Machine-readable resources

• /llms.txt: a Markdown index of every page, for language models
• /.well-known/api-catalog: the API catalog (RFC 9727), with an OpenAPI document for each Actor
• /.well-known/mcp/server-card.json: the MCP server card (Actors are served through Apify's hosted MCP server)
• /.well-known/agent-skills/index.json: agent skills for the main tools
• Every page also has a Markdown copy: add index.md to its address, or send Accept: text/markdown.

How to call an Actor

Replace YOUR_APIFY_TOKEN with your own Apify API token, and keep it private.

curl -X POST "https://api.apify.com/v2/acts/landlordtools~england-prs-registration-deadline/run-sync-get-dataset-items?token=YOUR_APIFY_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"postcodes": ["B1 1BB"]}'

Each Actor's page on Apify lists its inputs and outputs. Prefer a web page? The same checks are in the free tools.