1 / Ari Vatanen celebrates his 61st birthday today (April 27). The Finn clinched the World Rally Championship title in 1981 driving a Ford Escort RS1800, seen here during the Acropolis Rally.
2 / Jean-Pierre Beltoise is 74 today (April 26). The one-time grand prix winner is seen here during the 1968 Dutch Grand Prix at Zandvoort, where he would take his Matra MS11 to second place.
3 / April 25: Michele Alboreto was killed in an Audi sportscar testing crash on this date in 2001. It was also the date of his first F1 podium, achieved for Tyrrell at the 1982 San Marino GP
4 / On April 24 2005, Fernando Alonso took one of the most impressive victories of his early career as he fended off a fast-closing Michael Schumacher to win at Imola by just 0.215s.
5 / Sebastian Loeb announced on Monday (April 22) that he will continue to make inroads into road racing by competing in the Porsche Supercup. Here, the Frenchman is seen during the 2005 Le Mans 24 Hours.
6 / Red Bull's first Formula 1 win came just four years ago today, on April 19 2009, when Sebastian Vettel led Mark Webber in a one-two in a wet Chinese Grand Prix
7 / Tyrrell's first F1 victory with its own design was the 1971 Spanish Grand Prix on April 18 that year. Jackie Stewart is shown heading for Montjuich Park victory
8 / Riccardo Patrese turns 59 today (April 17 2013). Here, the Italian is seen during the 1993 Spanish GP at Barcelona in his last season in Formula 1, during which he drove for the Benetton team.
9 / Sir Frank Williams turns 71 on April 16 2013. Alan Jones was the Williams team's first F1 champion in 1980, and is seen at Watkins Glen
10 / Today, April 15 2013, marks 12 years since Ralf Schumacher, then driving for Williams, scored his maiden Formula 1 win in the 2001 San Marino Grand Prix at Imola.
11 / April 13 1986 was the day when Ayrton Senna fended off Nigel Mansell by just 0.014 seconds to win the Spanish Grand Prix at Jerez. For many years it stood as Formula 1's closest ever victory margin
12 / Today, April 11 marks 20 years since Ayrton Senna's famous European Grand Prix win at Donington Park in 1993.
13 / Mike Hawthorn would have been 84 on April 10, 2013. The Briton is seen here driving his Lancia-Ferrari 801 during the 1957 Italian Grand Prix at Monza.
14 / Jacques Villeneuve is 42 years old on April 9 2013. He is seen fending off Michael Schumacher on the way to his first F1 win at the Nurburgring in 1996
15 / The World Touring Car Championship races in Marrakech this weekend (April 5-7). The 1958 Moroccan Grand Prix was Africa's first world championship event. Mike Hawthorn is shown heading for second
16 / Andrea de Cesaris claimed his first Formula 1 pole position on 4 April 1982, when he headed the Long Beach grid in his Alfa Romeo
17 / The 1988 Formula 1 season - famously dominated by McLaren - began on 3 April, 25 years ago today. Alain Prost won round 1 at Rio in Brazil.
18 / F1 legend Jack Brabham is seen here driving his Brabham BT20 during the Mexican Grand Prix in 1966, when he would take his third title. Brabham turns 87 today (April 2).
19 / Former world rally champion Juha Kankkunen is 54 today (April 2). There, the Finn pushes his Lancia Delta HF Integrale during the 1992 Catalunya Rally, where he would finish in second.
20 / Just three races into his F1 career, Juan Pablo Montoya passed Michael Schumacher for the lead of the 2001 Brazilian GP with an aggressive move at Turn 1. Today, April 1, 2013, marks 12 years since that.