The finder covers every date from 1970 to 1979, using all 522 weekly Billboard Hot 100 charts of the decade.
Each of those dates lands on one of 253 number one songs, and the song shown is the one that was No. 1 the week your birthday fell in.
If you were asking "what was the number one song on my birthday", this is the place to start.
237 of the songs play right in the result from official artist and label uploads.
How the Finder Picks Your Song
Billboard printed a new Hot 100 every week, and every chart of the decade carries a Saturday issue date.
The finder treats each chart as covering seven days, from its issue date through the Friday after.
Your birthday falls inside exactly one of those weeks, and that chart's number one is your song.
Weeks Are Counted From the Charts
The result also says how long the song held the top, and which of those weeks your birthday landed in.
Those counts come from the weekly charts themselves, one chart at a time.
A song that left the top and came back has both runs added together.
The Edges of the Decade
The first chart of 1970 is dated Saturday, January 3, so New Year's Day 1970 still sits in the last chart week of 1969.
At the other end, the chart dated December 29, 1979 covers the last three days of the decade.
The data behind every answer is explained on the methodology page.
The Songs With the Most Birthdays
A song that stayed on top longer covers more birthdays.
- You Light Up My Life, Debby Boone: 10 weeks, the 70 days from October 15 to December 23, 1977.
- Night Fever, Bee Gees: 8 weeks in 1978.
- Tonight's the Night (Gonna Be Alright), Rod Stewart: 8 weeks across 1976 and 1977.
- Shadow Dancing, Andy Gibb: 7 weeks in 1978.
At the other end, 125 of the decade's number ones lasted a single week, so each one belongs to just seven birthdays.
The busiest years were 1974 and 1975, with 35 different chart-toppers each.
More 70s Number Ones
Every one of the 253 songs is in one sortable, playable table on the 70s Number One Hits page.
The busiest year has its own chart page in Top Songs of 1975.
The longest run of the decade sits in Top Songs of 1977.
Some dates have a full page of their own, like December 12 in Music History, and the finder links yours when it has one.
For a random year instead of a birthday, spin the 70s Decade Wheel.
Frequently Asked Questions
What if my birthday is January 1 or 2, 1970?
Your song is Someday We'll Be Together by Diana Ross and the Supremes, the final number one of the 1960s.
B.J. Thomas knocked it off the top on the January 3 chart.
What was number one on Valentine's Day 1977?
Torn Between Two Lovers by Mary MacGregor, on the chart dated February 12, 1977.
Two years later the Valentine's Day song was Da Ya Think I'm Sexy? by Rod Stewart.
What song was number one on Christmas Day 1976?
Tonight's the Night (Gonna Be Alright) by Rod Stewart, on the chart dated December 25, 1976.
It was the seventh of its eight weeks on top.
Sources
Every answer comes from this site's weekly Billboard Hot 100 file, checked against the sources below.
