What Day of the Week Was July 20, 1985? Discover Your Birth Day Instantly

July 20, 1985 was a Saturday. If you were born on this date, your birthday fell on the weekend! To find out the day of the week for any birthday—yours, a loved one's, or a historical figure's—you can use simple tools and a little calendar know-how. Below, you'll discover how to determine the day you were born, why it matters, fun ways to celebrate your "birth day," and how to answer the question "what day of the week was I born" for any date.

How to Instantly Find the Day of the Week You Were Born

Curious about your birth day? It’s easier than you might think! Here are the most accurate and convenient ways to check the day of the week for any birthday:

• Online Lookup Tools: Use free sites like Birthday Hunter’s birthday countdown tool, which shows your next birthday and the day of the week it falls on. For past birthdays, you can use date calculators or calendar converters (more on this below).
• Calendar Apps: Scroll back in your phone or computer’s calendar app to the year and month you were born, then locate your birth date.
• Manual Calculation: If you enjoy puzzles, try the Doomsday algorithm or Zeller’s Congruence (see next section for step-by-step instructions).
• Printed Perpetual Calendars: Some libraries and bookstores carry wall charts or pocket guides that match years, months, and days.

For the fastest and most accurate answer, use an online tool: enter your birth date, and your "birth day" appears instantly. Birthday Hunter’s age calculator also shows your exact age in years, months, and days, which can be useful for milestone celebrations.

How the Calendar Works: Why the Day Shifts Each Year

Ever wonder why your birthday lands on a different weekday each year? Here’s a quick breakdown of the logic behind calendar days:

• A year has 365 days (366 in a leap year), which is not evenly divisible by 7 (the number of days in a week).
• Each new year, your birthday advances by one weekday (e.g., Saturday to Sunday), or two if there was a leap year in between.
• Leap years occur every four years, adding February 29; this "skips" your birthday ahead by an extra weekday.

So, if you were born on Saturday, July 20, 1985, your birthday in 1986 was on a Sunday, in 1987 on a Monday, and so on. But after a leap year, it jumps two days forward. This pattern makes birthday planning a bit more interesting!

Manual Calculation: Zeller’s Congruence (For the Curious)

If you love math or want to impress your friends, try Zeller’s Congruence—a famous formula to calculate the weekday for any date. Here’s how you’d do it for July 20, 1985:

1. Adjust the month and year if it’s January or February (not needed for July).
2. Assign numbers: July = 7, Day = 20, Year = 1985.
3. Plug into the formula: h = (q + [(13(m+1))/5] + K + [K/4] + [J/4] + 5J) mod 7, where:
   • h = day of week (0=Saturday, 1=Sunday, ... 6=Friday)
   • q = day of month (20)
   • m = month (7)
   • K = year of the century (85)
   • J = zero-based century (19)
4. Calculate step by step (details skipped here for brevity), and you’ll get 0—Saturday!

Or, just use a free online calculator for instant results.

Why Knowing Your Birth Day Matters

Discovering the day of the week you were born is more than trivia—it’s a fun detail that connects you to personal history, traditions, and even pop culture. Here are five reasons people love uncovering their "birth day":

• Milestone Reflections: It’s a great conversation starter and a way to mark special anniversaries (e.g., "My 40th birthday is on a Saturday again!").
• Cultural Significance: Some cultures, like Ghanaian or Japanese, assign personality traits or naming traditions based on weekday of birth.
• Birthday Planning: Knowing your next birthday’s weekday helps schedule parties, trips, or time off work.
• Astrology & Numerology: Some believe your birth day affects your life path or fortune.
• Genealogy: Adds color to family trees and stories ("Grandma was born on a Sunday!").

Tracking your birthday’s weekday over the years can also reveal fun patterns—like who in your family shares a "birth day," or which years your birthday will next fall on a weekend.

How to Make Your Birth Day Special

Once you know the day of the week you were born, there are creative ways to celebrate or share that fun fact:

• Birthday Countdown: Get excited for your next milestone by using a birthday countdown tool—it tells you exactly how many days are left and which day of the week your birthday will land on.
• Birthday Wishes: Personalize your party invites or social media posts with unique messages. The birthday wish generator can help you craft the perfect greeting.
• Party Themes: Plan a "Throwback Saturday" (or whatever your birth day was!) party with music and trends from your birth year and weekday.
• Family Traditions: Start a tradition of sharing your "birth day" story or comparing which family members were born on the same weekday.
• Fun Facts Board: At a birthday gathering, set up a poster listing everyone’s birth days of the week.

These ideas can make your special day even more memorable and meaningful.

Comparing Birth Days: Why Some Dates Feel Extra Special

Did you know that some people feel extra lucky or nostalgic when their birthday falls on a weekend? Here’s a breakdown comparing different "birth days":

• Saturday or Sunday: Often associated with more relaxed, festive celebrations—no school or work for most people!
• Friday: Great for evening parties and starting the weekend with a bang.
• Monday-Thursday: Sometimes trickier for big gatherings, but perfect for quieter, more intimate birthdays or midweek treats.
• Holidays: If your birthday lands near a major holiday, you may share the spotlight or get extra time off.

Some people even check which years their birthday will fall on a weekend next, so they can plan milestone parties or trips. The Birthday Hunter birthday countdown makes this easy with future dates and weekdays.

Other Fascinating Facts About Your Birthday

• Born on a Leap Day? February 29 birthdays only occur every four years—making the day of the week even more unique!
• Shared Birthdays: Statistically, about 1 in 365 people share your birthday, but the weekday varies by year.
• Famous Saturday Birthdays: July 20, 1985 shares its Saturday status with celebrities and historic events—look up who else was born on your "birth day" for fun trivia.
• Global Traditions: In some countries, the day of the week you were born is celebrated with special names or rituals.
• Milestone Years: Every 5, 6, or 11 years (depending on leap years), your birthday falls on the same weekday as your original birth day.

Want to know more about birthdays, their meaning, or creative ways to celebrate? Visit the Birthday Hunter guides hub for expert tips, ideas, and birthday facts.

Frequently Asked Questions

How accurate are online tools for finding my birth day?

Most reputable online calculators use precise algorithms and the modern Gregorian calendar, which has been in use since 1582 in most countries. As long as you enter the correct date, your result should be accurate. For historical dates or calendars before 1582, double-check with a historical source or library resource.

Can I find out the weekday for anyone’s birthday, even decades ago?

Absolutely! Whether you want to look up a parent’s, grandparent’s, or famous person’s birthday, you can use the same tools and methods. Just enter the date, and you’ll get the weekday instantly. For leap years or dates before the Gregorian calendar, be aware of calendar changes, but for most modern birthdays, it’s simple and reliable.

Does the day of the week I was born have any special meaning?

It can! While not scientifically proven, many cultures and traditions assign meanings or personality traits to each weekday. For example, in Ghana, "Monday-born" or "Saturday-born" people have special names and are thought to have certain qualities. It’s a fun way to connect with heritage and personal stories.

How can I use Birthday Hunter tools to make my next birthday memorable?

The free tools at Birthday Hunter make it easy to plan and celebrate: use the birthday countdown to track the days until your next birthday, the age calculator for milestone ages, and the birthday wish generator for unique messages. For even more features, check out the Birthday Hunter app, which offers birthday freebies and reminders for all your friends and family.