To quickly change date format in Excel to the default formatting, do the following: Select the dates you want to format. On the Home tab, in the Number group, click the little arrow next to the Number Format box, and select the desired format - short date, long date or time.
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Description
Formats a date value using U.S. date formats. For international date support, use LSDateFormat.
- It takes current year in two digit format then checks for if input year length is equal to 2, if yes then it get current year and from this year it splits first two digits of century, then it adds this century with year user input. To make it 4 digit year.
- I cannot imagine what QB developers are thinking when they decide the just cannot code a column heading to show a fully understood, clear, unambiguous date in a 4-digit format. When I show reports to other people I have to manually ink in the last two digits of the four-digit year.
Returns
A text string representing the date formatted according to the mask. If no mask is specified, returns the value in dd-mmm-yy format.
Category
Function syntax
See also
Now, CreateDate, LSDateFormat, LSParseDateTime, LSTimeFormat, ParseDateTime
History
ColdFusion (2021 release): Added a JVM flag -Dcoldfusion.datemask.useDasdayofmonth. It defaults to false but when set to true and the mask contains D (uppercase D), the mask treats the value as d (lowercase d), day of the month. Hence, dateformat(now(), 'mm-D-yyyy') is the same as dateformat(now(), 'mm-d-yyyy') when flag is set to true. By default Capital D is used to specify Day of the year. See example below.
ColdFusion (2018 release) Update 3. ColdFusion (2016 release) Update 10, and ColdFusion 11 Update 18: Input formats 'm/d' or 'd/m', where masks m as month and d as date with valid month/day numerals are no more considered as valid date input. For example, see Example 2.
ColdFusion (2016 release) Update 3: Contains the following changes:
- You can use both lowercase and uppercase letters as mask characters.
- The following masks are added:
- e/E: Day in a week.
- f/F: Day of a week in a month.
- k/K: Hour in a day (1-24).
- w: Week of the year as
digit . ww : Week of the year as digits. Leading zero forsingle-digit week.
ColdFusion MX: Added support for the following mask parameter options: short, medium, long, and full.
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Parameters
Parameter | Description |
---|---|
date | Date/time object, in the range 100 AD-9999 AD. |
mask | Characters that show how ColdFusion displays a date:
|
Usage
When passing a date/time object as a string, enclose it in quotation marks. Otherwise, it is interpreted as a numeric representation of a date/time object.
Excel Format For Two Digit Date And Four Digit Year Mac 2018 Torrent
Date and time values in database query results can vary in sequence and formatting unless you use functions to format them. To ensure that application users correctly understand displayed dates and times, Adobe recommends that you use this function and the LSDateFormat and LSTimeFormat functions to format resultset values.
The DateFormat function is best used for formatting output, not for formatting input. For formatting input, use one of the date/time creation functions (for example, CreateDate) instead. |
Example 1
Output
date is : 15-Nov-18
day in a week is : Thu
day of a week in a month : 3
hour in a day: 12
week of the year as a digit: 46
Week of the year as digits. Leading zero for single-digit week. : 46
day in a week is : Thu
day of a week in a month : 3
hour in a day: 12
week of the year as a digit: 46
Week of the year as digits. Leading zero for single-digit week. : 46
The code above runs as expected and produces the following output:
The date is: 04-10
However, the code below throws an exception since the input date is in an incorrect format.
coldfusion.datemask.useDasdayofmonth
Vectra z32se manual. If you set the above flag as D, the snippet below produces the same output when the mask is set to d.
Date windowing is a method by which dates with two-digit years are converted to and from dates with four-digit years.[1] The year at which the century changes is called the pivot year of the date window.[2] Date windowing was one of several techniques used to resolve the year 2000 problem in legacy computer systems.[3]
Reasoning[edit]
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For organizations and institutions with data that is only decades old, a 'date windowing' solution was considered easier and more economical than the massive conversions and testing required when converting two-digit years into four-digit years.[4][3]
Windowing methods[edit]
There are three primary methods used to determine the date window:
- Fixed pivot year: simplest to code, works for most business dates.
- Sliding pivot year: determined by subtracting some constant from the current year, typically used for birth dates.
- Closest date: Three different interpretations (last century, this century, and next century) are compared to the current date, and the closest date is chosen from the three.
FOCUS[edit]
Information Builders's FOCUS 'Century Aware' implementation[5] allowed the user to focus on field-specific and file-specific settings.
This flexibility gave the best of all three major mechanisms: A school could have file RecentDonors set a field named BirthDate to use
- DEFCENT=19 YRTHRESH=31, covering those born 1931-2030.
Those born 2031 are not likely to be donating before 2049, by which time those born 1931 would be 118 years old, and unlikely current donors.DEFCENT and YRTHRESH for a file containing present students and recent graduates would use different values.
Examples[edit]
Unix and Windows systems have environment variables that set the fixed pivot year for the system. Any year after the pivot year will belong to this century (the 21st century), and any year before or equal to the pivot year will belong to last century (the 20th century).[6]
Some products, such as Microsoft Excel 95 used a window of years 1920–2019 which had the potential to encounter a windowing bug reoccurring only 20 years after the year 2000 problem had been addressed.[7]
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Below is a simple example of fixed date windowing COBOL code, often used to figure the century for ordinary business dates.
The above 'fixed-60' code establishes a fixed date window of 1960 through 2060. It assumes that none of the dates are before 1960, and should work until the year 2060.[3]
See also[edit]
- Serial number arithmetic, a form of windowing for sequential counters
Excel Format For Two Digit Date And Four Digit Year Mac 2018 Free
References[edit]
- ^Bridis, Ted (16 March 1999). 'Temporary Y2K fix may last only a generation'. Online Athens. Archived from the original(html) on 4 March 2016. Retrieved 13 February 2020.
Using windowing, programmers instruct software to guess the century for dates that fall within a specific 'window' of time, such as the next three decades. The computer interprets the year based on a future so-called hinge date, or pivot, that programmers choose arbitrarily
- ^Healton, Gilbert (12 July 2014). 'The Best of Dates, The Worst Of Dates'. Archived from the original(html) on 13 February 2020. Retrieved 13 February 2020.
A pivot year, also known as date windowing, takes a two-digit year and expands it to determine which century the year is in. Typically the year is converted to either a full four-digit year or into the year-1900 format, as appropriate to the application at hand.
- ^ abcHoward, Raymond B. 'The Case for Windowing: Techniques That Buy 60 Years'. Year/2000 Journal (Mar/Apr 1998).
Windowing is a long-term fix that should keep legacy systems working fine until the software is redesigned and/or replatformed.
- ^McNish, Larry (30 December 2019). 'The Y2K Pivot Year Problem'. Archived from the original on 15 January 2020. Retrieved 13 February 2020.
The choice of the actual pivot year was made by companies based on their historical records. It was in no way an industry standard, nor was this approach in any way professionally recommended. But it would work for a while.
- ^Kruskopfs, Peter. 'Solving the Date Dilemma'. Information Builders. p. 4. Archived from the original on 27 December 1996. Retrieved 2 March 2020.
expanded version of the sliding windows technique . File and field level settings
- ^'Chapter 1: Pivot Year'. APPX Software, Inc. 2003. Archived from the original(html) on 22 September 2012. Retrieved 13 February 2020.
By defining a pivot year, you direct APPX to determine what century a particular year belongs to. For example, if the pivot year is set to 35, then any date field with a year greater than 35 will be assumed by APPX to have a century value of 19. Any date field with a year less than or equal to the pivot year will be assumed by APPX to have a century value of 20.
- ^Livingston, Brian (9 February 1999). 'COMPUTING Spot & fix Y2K problems in Windows 9x & NT'. CNN. Archived from the original(html) on 17 May 2001. Retrieved 13 February 2020.
The other common behavior that Windows users will experience involves dates in spreadsheet programs such as Microsoft Excel, Lotus 1-2-3, and Corel Quattro Pro. If you have typed all your dates with four-digit years (such as 1/1/1999 and 1/1/2000), you should be fine. But if you have typed two-digit years (such as 1/1/29), you may be surprised at the way different programs handle the date.
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