A period of three weeks prior to the announcement of interim and half year reports and the year end report, is regarded as a silent period, where e.g. no physical or telephone meetings with investors and analysts are scheduled.
Silent periods during 2012 are:
11 January - 31 January
5 April - 25 April
28 June - 18 July
4 October - 24 October
Silent periods during 2011 are:
25 January - 14 February
30 March - 19 April
30 June - 20 July
7 October - 27 October