2019: 31st March - Clocks change to BST & also Mother's Day; 21st April - Easter Sunday; 12th May - US & Australia Mother's Day; 16th June - Father's Day; 21st June - Summer Solstice; 4th July - US Independence Day; 1st September: Australia Fathers Day; 27th October - BST ends & clocks change; 31st October - Halloween; 28th November - US Thanksgiving; 21st December - Winter Solstice; 25th December - Christmas Day.