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  2. Year 1900 problem - Wikipedia

    en.wikipedia.org/wiki/Year_1900_problem

    Microsoft Excel (using the default 1900 Date System) cannot display dates before the year 1900, although this is not due to a two-digit integer being used to represent the year: Excel uses a floating-point number to store dates and times. The number 1.0 represents the first second of January 1, 1900, in the 1900 Date System (or January 2, 1904 ...

  3. Help:Conditional expressions - Wikipedia

    en.wikipedia.org/wiki/Help:Conditional_expressions

    To make comparisons based on dates (e.g., if the current date and time is after some other date and time), first convert the time(s) to the number of seconds after January 1, 1970, using the function {{#time: U }}, then compare (or add, subtract, etc.) those numerical values.

  4. Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Microsoft_Excel

    Excel for the web is a free lightweight version of Microsoft Excel available as part of Office on the web, which also includes web versions of Microsoft Word and Microsoft PowerPoint. Excel for the web can display most of the features available in the desktop versions of Excel, although it may not be able to insert or edit them.

  5. Time formatting and storage bugs - Wikipedia

    en.wikipedia.org/wiki/Time_formatting_and...

    On 5 January 1975, the 12-bit field that had been used for dates in the TOPS-10 operating system for DEC PDP-10 computers overflowed, in a bug known as "DATE75". The field value was calculated by taking the number of years since 1964, multiplying by 12, adding the number of months since January, multiplying by 31, and adding the number of days since the start of the month; putting 2 12 − 1 ...

  6. Conditional text - Wikipedia

    en.wikipedia.org/wiki/Conditional_text

    Conditional text is content within a document that is meant to appear in some renditions of the document, but not other renditions. For example, a writer can produce Macintosh and Windows versions of the same software manual by marking Macintosh-specific content as "Macintosh only" and Windows-specific content as "Windows only."

  7. Year 2000 problem - Wikipedia

    en.wikipedia.org/wiki/Year_2000_problem

    While using 3-digit years and 3-digit dates within that year was used by some, others chose to use the number of days since a fixed date, such as 1 January 1900. [26] Inaction was not an option, and risked major failure. Embedded systems with similar date logic were expected to malfunction and cause utilities and other crucial infrastructure to ...

  8. Change your calendar time zone in AOL Mail

    help.aol.com/articles/change-your-calendar-time...

    Adjust your calendar's time zone for your current location to keep your events' times accurate. 1. In AOL Mail, click the Calendar icon 2. Click Calendar full view. 3. Click Settings icon | select Calendar Options.

  9. Date-time group - Wikipedia

    en.wikipedia.org/wiki/Date-time_group

    The DTG is usually placed in the header of the message. One example is "08:36 Feb 04, 2025 (UTC)"; while another example is "08:36 04 Feb 2025". The DTG may indicate either the date and time a message was dispatched by a transmitting station or the date and time it was handed into a transmission facility by a user or originator for dispatch.