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A constitution is a document, it does not have "events".
Congress approves an annual budget.
Annual Authorization is a bill that grant of money that doesn't ordinarily become available unless it is appropriated. It can be renewed annually, hence annual and must go through an Authorization Legislation when first granted and whenever renewed. There is often extreme amounts of Red Tape to go through to gain annual authorization (see http://www.law.cornell.edu/uscode/42/usc_sec_42_00005821----000-.html).
A political party can change its platform at any time. Normally resolutions and changes are submitted at the local level, often on an annual basis.
The casket of the person is placed in the middle of the rotunda area as mourners are allowed to file past paying their last respects. This is called lying in state.