These three properties of tebInvoiceDate have all been left blank: Format, Default Value and Input Mask.Įverything is in harmony: Access has stored the date as January 6th 2020, just as the user intended it to be. The Data Type of the InvoiceDate field is set to Date/Time. tebInvoiceDate has as its Control Source the InvoiceDate field in the table storing details of invoices. The lower text box is named “tebInvoiceDate”. We’ll use this snip taken from her Invoice form to illustrate the effects various settings in her form have on the display of the input date: Let’s assume that the user is inputting into a text box on a form and assume that she’s inputting using whatever technique she chooses. That a stored date and time is what the user intends and not a spurious one resulting from Access misunderstanding the input. That the user sees the date and time that Access is recording as a result of her input.He may use the Date Picker set against a text box, if the Picker is available or he may type “”, “24/9”, or “24/9/19” or any other conceivable arrangement of day, month, year and separation characters. In my experience, a user will input dates and times in the way in which he is habituated. If you input into that field a date, or a date and time, in a pattern that doesn’t match that in your Region Settings, then Access will exercise initiatives in interpreting your input. If you set the Data Type property of a field in an Access table to Date/Time, then Access will reject your attempt to input into that field anything that it fails to interpret as a date or as a date and time. Copy and paste any of the examples below into your Immediate Window and then press Enter to see the result. You can use the Immediate Window in Access’s Visual Basic Editor to test how Access works with dates. Add another decimal place - 0.666666 - to achieve 4:00:00 PM exactly.Ī number with digits to the left and right of the decimal point is how Access stores date and time together. 0.66666 represents 3:59:59 PM - very nearly two-thirds of the way through a day, at 15 hours, 59 minutes and 59 seconds. The decimal part of a number stored in a Date/Time field represents time as a fraction of 24 hours. Count 43843 and you’d be at January 13th 2020. Access stores January 1st 100 CE as the number -657434 December 31st 9999 CE, as 2958465.Ĭount one for each day since January 1st 100 CE to the date you have in mind and you have the number Access stores representing that date. The integer part of a number stored in a Date/Time field relates to Access's built-in calendar that runs from January 1st 100 CE to December 31st 9999 CE. I believe I must make a database manage dates and times correctly irrespective of any tinkering a particular user may do to their Windows settings.Īccess stores input into a Date/Time field as a floating point number that is, a number with an integer part and a decimal part. I illustrate them here because they have an influence on the results of some of the tests on Access’s conduct of dates and times that appear below.Īs a database developer, I never insist that a client adopts one set of Language Preferences over another. I don’t alter these default settings, for reasons I explain below. The settings shown above are for my computer, as supplied to me in the UK. Then choose Region to display the Region dialog box. The setting is in Window 10’s Control Panel: open Control Panel and navigate via Clock and Region . Much of Access's response to dates and times, is determined by the region to which the computer you’re using is set.
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