21 March - 19 April
20 April - 20 May
21 May - 21 June
22 June - 22 July
23 July - 22 August
23 August - 22 September
23 September - 23 October
24 October - 21 November
22 November - 21 December
22 December - 19 January
20 January - 18 February
19 February - 20 March
