Ɔwɛn-Aban—1989 January 1 January 15 February 1 February 15 March 1 March 15 April 1 April 15 May 1 May 15 June 1 June 15 July 1 July 15 August 1 August 15 September 1 September 15 October 15 November 15 December 15