Saturn return
When Saturn comes back to where it was at your birth, around age 29. Traditionally, a coming of age.
Saturn takes about 29 and a half years to go once round the zodiac. So somewhere around your 29th birthday, it comes back to the exact spot it was in when you were born. That's your Saturn return. A second one comes in your late fifties. In astrology, Saturn is where you're tested and build lasting mastery. It's about time, structure and responsibility: the things that take years to get right. Your Saturn return is the first time Saturn completes a full lap of your chart, so astrologers read it as a check on everything you've built so far.
By tradition, it's a coming of age. The job, the relationship or the city you picked at 22 gets a hard second look. Some things end. Others get serious. Many people say it's when adulthood actually started for them: less about what you were told to want, more about what you'll stand behind.
It isn't one day. Saturn moves slowly, and it turns retrograde for a few months every year. So it can cross its birth spot once or three times. Counting the whole time it spends in your Saturn sign, the season lasts about two to three years.
You don't need to know astrology to notice it. Ask people in their early thirties what happened around 29, and most have a story: a move, a break-up, a new job, a decision they'd put off for years. Astrologers would say that's Saturn doing its job. It asks for proof that the life you're living is one you chose.
To read your own, start with Saturn's sign. The sign shows the kind of lesson. Saturn in Aries asks you to act without waiting for permission. Saturn in Libra asks for fairness in your partnerships. Saturn in Pisces asks you to give your dreams a shape. Then look at the house. It shows where in life the review happens. Saturn in the 10th house turns it towards work and direction. In the 7th, it's commitment and close partnerships. In the 4th, it's home and family. Any tight aspects to Saturn add the people and parts of you that get pulled in.
It isn't a curse, whatever the internet says. Saturn rewards effort, and tradition says what you build during your return tends to last. The hard part is honesty: seeing what isn't working, and choosing to rebuild it slowly. In Horozy, open your chart in the Chart Explorer and tap Saturn in your placements list. You'll see its sign, its house and the aspects it makes, in plain English, with the working underneath.