1 -  1969: Tuesdee Testa, 27, became the first female jockey to win a race at a major American Thoroughbred track when she won the third race at Santa Anita Park aboard Buz On.

 1991: Pat Day, 37, became the sixth rider in history whose mounts earned $100 million when he rode Wild Sierra to a second-place finish in the first race at Oaklawn Park.

 2 -  On this day in 1887, the American Trotting Association was founded in Detroit, MI.

1940: Beaten by a nose in both the 1937 and 1938 Santa Anita Handicaps, Seabiscuit finally won the Big 'Cap in his final race. He retired the then-leading money-winning horse in the world.

1966: Kelso, Horse of the Year 1960-64, ran his last race, finishing fourth at Hialeah Park.

3 -  1966: Ogden Phipps' Buckpasser won the Flamingo Stakes by a nose, under the guidance of Bill Shoemaker. The colt was such a prohibitive favorite among the field of nine that the race was declared a non-wagering contest and was dubbed "The Chicken Flamingo."

1985: Bill Shoemaker became the first jockey in history to win $100 million in purses after he won the Santa Anita Handicap aboard Lord at War (ARG).

1993: Russell Baze had his 4,000th career win, with Frank Musso, at Golden Gate Fields.

 4 - Today in 1791,  Vermont, the 14th state, was admitted to the union on this day. Why is this significant to a horse website, you ask? Because the Morgan horse is the state animal. Now do you get it?

1988: Julie Krone became the winningest female jockey in racing history when she won the 1,205th race of her career riding a filly named Squawter in the ninth race at Aqueduct Racetrack.

1977: Seattle Slew made his three-year-old debut, at Hialeah. He won a seven-furlong race in 1:20 3/5, breaking the track record.

1993: At age 41, jockey Eddie Delahoussaye had his 5,000th career winner, aboard Ackler in the fifth race at Santa Anita Park. He was the 14th rider in North American Thoroughbred racing to reach that plateau.

1966: In the last race of his 40-year career, John Longden won the San Juan Capistrano Handicap at Santa Anita Park, aboard George Royal. He retired with a then-record number of victories, 6,032.

2003: Jockey Ron Warren Jr. registered his 3,000th career win aboard Tin and Tonic in the seventh race at Golden Gate Fields.

1941: Merrick died at age 38, establishing the longevity record for a Thoroughbred.

1976: Bill Shoemaker won his 7,000th career victory, aboard Charlie Whittingham-trained Royal Derby II, in the fifth race at Santa Anita Park.

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 17 -  1973: In his three-year-old debut, Secretariat won the Bay Shore Stakes at Aqueduct by 4 ½ lengths.

 2000: Trainer Hubert “Sonny” Hine, trainer of 1998 Horse of the Year Skip Away, passed away after a long illness at age 69.

1949: Jockey Bill Shoemaker rode his first career race, at Golden Gate Fields. He finished fifth, aboard Waxahachie, in an eight-horse field.

1969: Less than two months after she became the first woman to ride in a parimutuel race in America, Diane Crump rode her first winner at Gulfstream Park.

1932: Omaha, the only Triple Crown winner to be sired by another Triple Crown winner (Gallant Fox), was foaled at Claiborne Farm, Paris, Ky.

1940: Future Triple Crown winner Count Fleet was foaled at Stoner Creek Stud, Paris, Ky.

1941: Upset, the only horse ever to defeat Man o' War, died at age 24.

1953: A program for nationwide televising of 10 of the richest races being run in New York and Delaware, was announced. NBC and ABC provided network coverage for the Saturday broadcasts, which were scheduled for April 18-June 20.

1997: Assicurazioni Generali, the lead underwriter on the congenital infertility insurance on Horse of the Year Cigar, agreed to pay the $25 million claim filed by owners Allen Paulson and Coolmore Stud. Coolmore received $18.75 million and Paulson got $6.25 million, representing the parties' respective 75% and 25% ownership interests.

1966: Jockey Eddie Maple won his first career race, at Ascot Park in Cuyahoga Falls, Ohio

1992: Henryk de Kwiatkowski purchased Calumet Farm for $17 million at auction. He paid an additional $210,000 for the Calumet name.

1997: A group of Thoroughbred organizations, including The Jockey Club, Breeders' Cup Ltd., Keeneland Association and Oak Tree Racing Association, announced it would undertake a joint planning process to create a national coordination and marketing structure for Thoroughbred racing.

1938: In observance of Man o' War's 21st birthday, the celebration was broadcast nationally via radio from Faraway Farm, where he stood at stud.

1969: Diane Crump became the first female jockey to win a stakes race when she took the Spring Fiesta Cup at the Fair Grounds aboard Easy Lime.

1988: Jockey Pat Day won his 4,000th victory, aboard Ann's Bid, in the ninth race at Oaklawn Park

1997: The $4 million Dubai World Cup was rescheduled for April 3 after torrential rainstorms hit Nad Al Sheba racecourse

1952: New York Governor Thomas Dewey signed a statute transferring licensing authority from The Jockey Club to the New York Racing Commission.

 1985: Laffit Pincay Jr. became the second jockey in history to surpass John Longden's record of 6,032 victories, riding Sovereignty to victory in the sixth race at Santa Anita Park.