Dima Tretyak

Software developer. I built this site and the engine that calculates its dates.

I'm a full-stack software developer with more than 15 years of experience building web and mobile products. This site is my own project. I built it, along with its calculation engine and the pipeline that writes and checks the texts.

What I'm not

I'm not a professional astrologer. I don't do readings and I don't have clients. The meanings on this site come from traditional astrology books and short notes on modern practice, not from my own practice. The about page explains how to read them.

Why the dates are calculated

Astrology sites sometimes disagree about when a retrograde starts or which day a full moon falls on, often because of time zones. I wanted every date and degree here to come from a calculation I can check. The engine is tested against NASA JPL Horizons, and every event is shown in Eastern, Central, Mountain and Pacific time.

How the texts are written

The texts are written by AI from the calculated data on each page and an interpretation base built on public-domain books. I set the rules and the automated checks, and I approve the first page of every new page type before more pages of that type go live. I don't proofread each page by hand. The details are on the methodology page.

Found a wrong date or time? Tell me, and I'll fix it.

Elsewhere

Updated October 23, 2026