So last Tuesday I finally decided to figure out this “first decan Aries” thing I kept seeing everywhere. Honestly, it sounded like astronomy class all over again, but for astrology folks. People kept throwing terms like “decan compatibility” around like it was obvious, and I was sitting here like… nah. Needed a simple starting point.
What the Heck is a Decan Anyway?
Started by digging into the basics. Okay, each zodiac sign lasts about 30 days. But apparently, it gets split into THREE chunks – ten days each, more or less. That’s the decans. So for Aries, the first decan covers birthdays roughly March 21st to March 30th. That’s “1st decan Aries”. The next chunk, April 1st to 10th-ish, would be second decan, and so on. Cool, simple enough. Didn’t need a telescope for that.
My Goofy Attempt at Self-Analysis
Right, I’m a solid first decan Aries – born March 25th. So I grabbed my own birth chart (just a freebie one online) and stared. All I saw was “Aries Sun”. Needed more detail. Poked around settings until I found where it showed planetary positions in degrees. Mine’s at 4° Aries. Since 0° to 9°59′ falls under the first decan, bingo! Confirmed I was dealing with my own kind.
Playing Astrology Matchmaker
Time for the fun part: compatibility. The theory says first decan Aries vibes differently with other signs compared to later decans. Started scribbling notes:

- Fire & Fire: Figured other first decan fire signs (Aries, Leo, Sagittarius) would be intense. Like two sparklers going off. Tested chatting with a Leo friend – instant hype energy, felt turbocharged, but could also see us accidentally burning dinner while arguing over whose playlist rocks more.
- Fire & Air: Gemini and Aquarius folks? Talked to a late March Gemini. Conversations felt like pinball – exciting, fast, bounced everywhere. But planning anything? Forget it. Great for spontaneous adventures, terrible for booking dentist appointments together.
- Fire & Earth/Water: Tried understanding Taurus and Cancer dynamics. Taurus folks wanted calm vibes; felt like pouring water on my campfire buzz. Cancer? All sweet and caring but kinda wanted to stay home knitting. Couldn’t stop fidgeting. Just… nope.
What Actually Clicked
After a week of mental mapping:
- Sparks Fly Best With: Other first decan fire signs and air signs, especially if they’re also first decan. High energy + unpredictability = chaotic fun. Early Leo or Sagittarius buddies just get the impulsive “let’s go NOW” vibe.
- Potential Trainwrecks: Strong earth (Taurus, Virgo) or water signs (Cancer, Pisces) right off the bat. Unless they’re super adventurous themselves, it feels like moving through sludge. Different gears. Slower, softer. Exhausting for my little fireball soul.
- Surprise Mix: Late Scorpio folks? Weirdly intense focus. Like wrestling an octopus while planning world domination. Tiring but exciting.
So yeah, didn’t need a Ph.D. in zodiac studies. Just broke it down into birthday chunks, looked at real interactions, and spotted obvious patterns. First decan Aries? We crave fast-paced, energetic partners who won’t drown our spark. Period.
