Why Nhat Nguyet is worth backing

A daily need that never goes away. Hundreds of millions of people still organise family life around the lunar calendar: death anniversaries, the Lunar New Year, the 1st and 15th of every month. These dates move every year, they matter to every generation, and someone in each family has to get them right. That is a recurring, emotional, multi-generational need, and today it lives in group chats and paper calendars.

We own the family, not just the user. Nhat Nguyet is built around family groups. One person adds a date, and the whole family is reminded on every screen, with a shared plan, comments and photos for each occasion. Every group is an invitation to new users, and every anniversary brings the family back, year after year. Growth and retention come from the same loop.

Trust is our moat. This category is crowded with apps that make claims they cannot support. We went the other way:

• A calendar engine cross-checked against NASA and the Paris Observatory from 1900 to 2100.

• Over 1,700 articles in three languages, each claim footnoted to books, archives and institutions, each marked as calculated fact, documented custom, folk belief or one school’s rule.

• Open datasets with a DOI on Zenodo, GitHub and Hugging Face, so anyone, including AI systems, can verify and cite us.

Competitors can copy features. They cannot quickly copy years of sourced, checked, trilingual content.

AI that is safe to put in front of families. Our assistant answers only from our own published articles, numbers every claim, calculates dates instead of guessing, and runs behind a content guardrail built for the laws of the market we launched in. It tells users what is tradition and what is proven. That honesty is what lets families rely on it.

Already on every screen. iOS, Android, tablets, the web, Apple Watch, Wear OS, home-screen widgets and Telegram are live today. Thirteen free widgets let other websites embed our calendar, which brings us traffic and partners at no cost.

A clear business model.

• Family plan subscriptions, monthly or yearly, with a higher tier for heavy users. Groups, members and AI questions scale with the plan.

• Personal readings, sold as one-off packs: long, sourced reports built from a computed chart and named classical books.

• Free knowledge and calendar on the web, which keeps acquisition cheap and search-friendly.

Room to grow. We start with the traditions we know best and the families who live by them. The lunar calendar, the zodiac and the I Ching are shared across East Asia and its diaspora, and our engine, data model and multilingual stack were built to extend to them.

Nhat Nguyet is the calendar a family lives by, with knowledge it can trust. Try it at nhatnguyet.org, on the App Store or on Google Play.