Supported date formats

Preceden supports a wide variety of date and time formats.

Few quick notes on the date/time formats we support:

  • Where months are spelled out, you can use upper or lower case, and abbreviations are supported
  • Commas, either in dates or used to delineate large years, are optional
  • Years can be shortened two digits, but note: 29 to 99 will be interpreted as 1900s, 0 to 28 as 2000s
  • For the years 1 - 99 AD, you need to include the AD after the year (to tell it apart from the shortened modern years)
  • Spaces before BC/AD/etc are optional as are those before AM and PM
  • Preceden supports date ranging from 200,000 BC to 200,000 AD
  • When you specify an end date for an event, Preceden assumes you want the event to include that end date (learn more).

Date Formats

  • 2016
  • May 2016
  • 5/2016
  • May 8, 2016
  • May 8th, 2016
  • 5-8-2016
  • 5/8/2016 - Note that this is MM/DD/YYYY which we use in the US; if your country uses DD/MM/YYYY you may want to use the next format
  • 8 May 2016 - You can use this format if your country uses a DD/MM/YYYY format.
  • 8th of May 2016
  • 8 de Mayo 2016
  • 8 de Mayo de 2016
  • 60,000 BC - We support BC, BCE, BP, FVT, AD, CE, AC, DC, EVT; periods and spaces between the letters are optional
  • Today or Present or Now or Ongoing (and equivalents in other languages) will tell Preceden to always use the current date
  • You can also enter the start and end date in the start date field separated by a hyphen and Preceden will automatically split them into the start and end date: 2014 - 2018.
  • Additionally, you can enter a start date such as 1940s and it will automatically be split into 1940 to 1949 when the event is created.
We also support a variety of month names in other languages. If yours is not currently supported, please drop us a note and we'd be happy to add support for your language.

Time Formats

When the date is specified, you can also include a time:
  • May 8, 2016 1pm - pm and PM both work
  • May 8, 2016 1:23pm
  • May 8, 2016 1:23:05pm
  • May 8, 2016 13:23:05 (when no AM or PM is specified, it's assumed to be 24 hour time)

Durations

For event end dates, Preceden also supports durations which are automatically added to the event's start date. Here are a few examples:

  • 2 seconds
  • 8 minutes
  • 5 hours
  • 3 days
  • 7 weeks
  • 9 months
  • 1 year
  • 2 years 8 months 1 day 5 minutes

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