Merit Effective Date after fiscal year - most comon

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I wanted to get a sampling for when merit increases are effective after the close of the fiscal year for clients/companies.  I know it depends on the size and complexity of a company but generally, what have you seen for effective dates post fiscal year related to a mid-size organization (around 15K employees)?  For example, it could be 1 to 4 months post fiscal year.  Any insight would be appreciated!