Ten industries, one calendar problem
Each of these sectors depends on Hindu calendar dates being right, and each has been solving it by hand. The pages below set out the problem, the endpoints, and the workflow.
Temple Management
Darshan schedules that follow the calendar, not a spreadsheet
Temple timings shift with tithi, festival and muhurat. Most temple software encodes them as static opening hours, so every festival becomes a manual override — and the override is often applied a day late.
Read the workflowMatrimony
Kundli matching with a score you can explain to a family
Compatibility scores are the single most scrutinised number in a matrimony product. A score with no breakdown invites distrust, and a score that disagrees with the family astrologer without explaining why loses the customer.
Read the workflowWedding Platforms
Find the dates that actually work
Couples ask for “an auspicious date in November”. Answering that means intersecting muhurat windows, festival exclusions and venue availability — usually done by hand, by someone with a printed almanac.
Read the workflowHR Systems
Holiday calendars that regenerate themselves
Indian holiday calendars are regional, partly lunar, and republished every year. Most HR systems store them as a static list that someone updates each December, which breaks for offices in different states.
Read the workflowERP
Calendar intelligence inside the systems that run the business
Production planning, logistics and finance all assume a Gregorian working calendar. In practice, demand, staffing and shipping in India move with the festival calendar.
Read the workflowMedia
Programming and editorial calendars with provenance
Newsrooms publish festival dates months ahead. A wrong date is a correction notice; a date with no source is an argument with the desk.
Read the workflowPublishing
Almanac-grade data, generated rather than typeset
Panchang almanacs are still largely produced by hand. The typesetting is the easy part; the calculation and proofing consume the schedule.
Read the workflowAI Agents
Grounding for models that would otherwise hallucinate a date
Language models are confidently wrong about Hindu calendar dates. They interpolate from training data, and festival dates are exactly the kind of fact that moves every year.
Read the workflowTravel
Pilgrimage and departure timing as first-class data
Pilgrimage demand spikes are entirely predictable from the calendar, yet most travel platforms discover them from booking volume after the fact.
Read the workflowGovernment
Public calendars that can withstand scrutiny
Official holiday notifications and public event scheduling must be defensible. A date published by a department is expected to have a basis, and “the vendor’s software said so” is not one.
Read the workflowNot sure which fits?
Most integrations come down to three endpoints: panchang for the day, festivals for the calendar, and explain for when someone asks why. Start there.