Lunar days calculation by date of birth.

Lunar days calculation by date of birth.

The script is created for all those who need to know a person’s lunar birthday (for example, to determine the lunar birthday of ancestors, to choose the right day for their veneration in Pitri Pakshi, to analyze “lunar days” in large genealogical databases, etc.).

What does this script do?

Accepts raw data
Uploads a pedigree file in GEDCOM format (a common format for genealogical programs). Accepts a regular Excel file with the columns “Name” and “Date of birth”. Allows you to manually enter the name and date of birth directly into the web form.

Calculates lunar birthday
For each person, determines on which day of the lunar month (1 – 30) they were born. Takes into account geographic coordinates (the user selects the country) so that the count is astronomically accurate.

Shows and groups results
Table “by people” – a list with name, date of birth, lunar day number and “Alive / Dead” status. Table “by lunar days” – who was born on the first, second … thirtieth lunar day, indicating the Sanskrit names of these days (useful for shraddha rituals). There is sorting by any column, filtering “alive / dead”, editing of any entry directly in the browser.

Five reasons why this is very convenient

1. Universality of input data
   GEDCOM, regular Excel, and manual input are supported – no need to convert your database to any special format.
2. Calculation accuracy
   The actual coordinates of the place of birth are taken into account (11 countries in the list; any can be added if necessary). This is important because the lunar day “moves” at different times of the day in different latitudes.
3. “Everything in the browser” – no installations
   Just run the script (Flask + standard pip packages) and open the link. A genealogist who does not know how to program simply drags the file and gets a ready-made table.
4. One-button export to Excel
   The result can be given to a colleague, printed or inserted into another report without losing formatting and preserving the grouping “by lunar day”.
5. Flexible work with the result

• Filtering “living / deceased” – you can immediately see who needs to offer shraddha.
• Sorting by name, date or lunar day number.
• Editing without reloading the page.