Wednesday's celebrations

April 27th has a bunch of celebrations to consider:

Write An Old Friend Today Day
National Tell A Story Day  
National D.J. Day

National Prime Rib Day
New Beginning Festival  
Sleep Day
Soupstock 

Administrative Professionals Day (aka, National Secretary's Day, 1955) (always the Wednesday of the last full week of April/on the Wednesday before the last Saturday in April)
Babe Ruth Day

Morse Code Day - birthday of Samuel Morse, inventor (1791)
There is a Morse code list of letters and numerals (dashes and dots) and a telegraph key to send the code: A typical "straight key." This U.S. model, known as the J-38, was manufactured in huge quantities during World War II, and remains in widespread use today. In a straight key, the signal is "on" when the knob is pressed, and "off" when it is released. Length and timing of the dots and dashes are entirely controlled by the operator.

World Graphic Design Day (Communication design discipline)
Festival of Art Sabotage
The universe is created (On this day in 4977 B.C.), according to German mathematician and astronomer Johannes Kepler, considered a founder of modern science. Kepler is best known for his theories explaining the motion of planets.

The first Social Security checks were distributed on this day in 1937
Matanzas Mule Day, 1898 - first naval actions of the Spanish-American War, US naval forces bombarded the Cuban village of Matanzas and the only casualty of the bombardment was one mule
Birthday - President Ulysses S. Grant (18th President) 1822
Christian Feast Day: honoring saints   
St. Zita's Day (patron of housemaids, finding lost keys)
St. Liberalis Day
Internet Evangelism Day
Freedom Day (South Africa) It celebrates freedom and commemorates the first post-apartheid elections held on this day in 1994

UnFreedom Day (South Africa) day of mourning, annual celebration of South Africa's first non-racial democratic elections of 1994 Independence Day (Sierra Leone) independence from United Kingdom in 1961
Independence Day (Togo) independence from France in 1960
National Day of Resistance (World War II) Day of the Uprising Against the Occupying Forces (Slovenia)
National War Veterans' Day (Finland)
2nd Republic Day (Austria)
Crown Prince William Alexander Day (Netherlands)
Constitution Day - in Yugoslavia (1992)

Kidsproj - VHASAKI / Culture Day in India
Meenakshi Kalyanam - in India; Hindus celebrate the marriage of the goddess Meenakshi and Lord Sundereswarar (also known as Lord Shiva) and commemorate their own marriages; celebrated as part of the Hindu Chitrai Festival, with a huge procession to the Meenaskshi Temple
Panguni Uttiram (Malaysia and Singapore) celebrated with free food, Malaysia & fire walking ceremony at the Sri Mariamman Temple, Singapore
Saur Revolution Day (Afghanistan) 1978
Dan We Zo, alias St Louis Cleimeille (Haiti)
Montserrat's Day (Catalonia)
Battle of Flowers Fiesta Event (San Antonio, TX)
Horse Day (Turkmenistan) (last Sunday of April since 1991) celebrate their "heavenly horses" which they inherited from their ancestors

(Sources: Wikipedia & Google; photo credits: prime rib, blogs.babble.com; old envelope, archives.gov.on.ca; multitasker, snellingnj.com; Chart of the Morse code letters and numerals, Wikipedia; telegraph key, Wikipedia; Social Security check in the mail, lifeaftersixty.wordpress.com; Day of Freedom, S. Africa, artaidsart.blogspot.com; Odissi performer from Odisha, Wikipedia; Horse Day, Dragon Head with rider, news.chinaa2z.com)