Your accounting day doesn't start at midnight: it starts at the hour you close. If your hotel's cutoff is seven in the morning, a payment taken at two in the morning belongs to the previous day, because that's how the shift that took it lived it.
Containn applies the cutoff hour you set to your property's time zone, using the daylight saving offset of the date in question, not today's. A hotel that wants calendar days uses a midnight cutoff: midnight is the calendar day.
Why we insist on this
A miscalculated window doesn't look like an error; it looks like a number. A tax report that measured in universal time instead of hotel time could show sixteen reservations where there were eight, with twice the taxable base, and nobody notices until someone adds it up by hand.
Where to set it
- Go to Settings → Time Zone and pick the city that keeps the same time as your hotel.
- On the same screen, under Hotel day rollover, choose the Cutoff time: from 12:00 am (midnight) to 12:00 pm (noon). If you've never set it, the system uses 9:00 am, the recommended option.
- Save your changes.
The front desk uses the same hour: if a guest arrives in the early morning, before the cutoff, to sleep the night that's ending, their new reservation starts on the previous day's date.
How the reports state it
Night close reports state in their header which window they measure, for example from 07:00 to 07:00 the next day. With a midnight cutoff they state that it's the calendar day, from 00:00 to 24:00 hotel time.
When the auditor closes the day
With the night audit on, in Settings → Accounting concepts you can turn on The auditor closes the business day. The clock then stops moving the date: it stays put until the auditor runs the day's close, and everything captured belongs to that day. The reports say so: the day is opened and closed by the auditor, not by the clock.
A transaction entered late
When you add a charge or a payment and more than one day is open, a business date selector (Día de operación) appears. The auditor who enters last night's payment at seven in the morning sends it to yesterday. You can go back up to 14 days, and signed days never appear.