The UK has had its Budget in spring as far back as those given by Gladstone, starting in 1853. The 2017 Budget will be the last to be held in the spring - it will be moving to the autumn.
Sydney Buxton, Finance and Politics: An Historical Study, 1783–1885. Volume I (John Murray, 1888), pp. 108–09.
Does the attack when a man drove a bus into worshippers at Finsbury Park mosque count as terrorism?