June 12 is the 163nd day of the year. There are 202 days left.

Today's number is 12

12 is divisible by 2, 3, 4, and 6. making it a great base for a number system
12 is the sum of two primes, 5 & 7
A polygon with 12 sides is a dodecagon.
A polyhedron with 12 faces is a dodecahedron.
Cuboids (cubes & rectangular prisms) have 12 edges
Regular icosahedrons have 12 vertices.
12 is magnesium
A year has 12 months
The 24 hour day is generally broken up into 2 - 12 hour segments, am & pm
There are 12 inches in a foot.
There are twelve basic hues in the color wheel
In craps, 12, is a double 6. It is called Boxcars and is craps (loses or craps out) on a come out roll.
Humans have 12 pairs of ribs
There are 12 Federal Reserve Districts
There were 12 kniggits of the round table
There are 12 signs of the zodiac
There were 12 Angry Men
The 12 bar blues is a popular musical form
12th Night is a comedy by Shakespeare

Title 12 of the US Code is BANKS AND BANKING.

12 BCE
was the Year of the Consulship of Messalla and Quirinius
Halley's Comet appeared.

12 CE
was the Year of the Consulship of Caesar and Capito
Caligula was born

On this day in:

1381 – Rebels arrived at Blackheath in Wat Tyler's Rebellion.
1776 – The Virginia Declaration of Rights was adopted
1798 – British troops began sdhelling the town of Ballynahinch.
1898 – The Philippines declared their independence from Spain.
1942 – Anne Frank received a diary as a birthday present
1944 – Paratroopers of the 101st Airborne Division secured the town of Carentan
1963 – Medgar Evers was murdered by Ku Klux Klan member Byron De La Beckwith
1964 – Nelson Mandela was sentenced to life in prison
1967 – Loving v. Virginia was decided, voiding all laws that prohibited interracial marriage
1990 – Russia Day: The Russian Federation's parliament declared its sovereignty
1991 – Russians elected Boris Yeltsin president

Born this day in:

1519 – Cosimo I de' Medici, Grand Duke of Tuscany
1802 – Harriet Martineau, sociologist and author
1806 – John A. engineer who designed the Brooklyn Bridge
1892 – Djuna Barnes, novelist, journalist, and playwright; wrote Nightwood
1899 – Fritz Albert Lipmann, biochemist, received a Nobel for coenzyme A
1899 – Weegee, photographer and jphotojournalist
1908 – Marina Semyonova, soviet ballerina and educator
1910 – Bill Naughton, playwright and author
1920 – Dave Berg, (mostly mad) cartoonist
1924 – George H. W. Bush, US' first CIA President
1928 – Vic Damone, actor, singer and songwriter
1929 – Anne Frank, diarist
1930 – Jim Nabors, actor and singer
1931 – Trevanian, author
1931 – Rona Jaffe, author
1932 – Mimi Coertse, singer
1933 – Eddie Adams, photographer and photojournalist
1937 – Vladimir Arnold, mathematician
1941 – Chick Corea, pianist and composer
1941 – Roy Harper, singer, songwriter, guitarist and actor
1941 – Reg Presley, singer and songwriter
1942 – Len Barry, singer and songwriter
1949 – John Wetton, singer, songwriter and bassist
1951 – Brad Delp, musician and singer
1968 – Bobby Sheehan, bassist and songwriter
1977 – Kenny Wayne Shepherd, singer, songwriter and guitarist
1985 – Blake Ross, programmer & co-creator of Firefox

Died this day in:

1567 – Richard Rich, I shit you not, first Baron Rich.
1957 – Jimmy Dorsey, saxophonist, composer, and bandleader.
1963 – Medgar Evers, activist
2011 – Carl Gardner, singer (The Coasters)

Holidays, Holy Days, Festivals, Feast Days and such:
Loving Day
World Day Against Child Labour

So, for music 

12
Halley's Comet
Medgar Evers
Vic Damone
Jim Nabors
Mimi Coertse
Chick Corea
Roy Harper
Reg Presley
Len Barry
John Wetton
Brad Delp
Bobby Sheehan
Kenny Wayne Shepherd
Jimmy Dorsey
Carl Gardner






 - 

Halley's Comet

Medgar Evers

Vic Damone

Jim Nabors

Mimi Coertse

Chick Corea

Roy Harper

Reg Presley

Len Barry

John Wetton

Brad Delp

Bobby Sheehan

Kenny Wayne Shepherd

Jimmy Dorsey

Carl Gardner

Bonus #1

Bonus #2