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First & Last Day of Month

Billing cycles, payroll runs, report windows — know your month boundaries instantly.

Month
Year Enter a year between 1 and 9999
Quick Jump
← Prev Month Next Month → Q1 Start (Jan) Q2 Start (Apr) Q3 Start (Jul) Q4 Start (Oct) Dec (Year End) Feb (Leap Check)
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First Day
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Total Days
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Last Day
⚙️ Working Days (Mon–Fri) —
🛌 Weekend Days —
📆 Calendar Weeks Spanned —
📊 Quarter —