Fuzzy date input

This control allows a user to record a date to three levels of detail - exact day, month+year or year only. It uses javascript to convert various input formats into yyyy-mm-dd, yyyy-mm or yyyy, & provide the user with confirmation. If an input is ambiguous (eg 01/02/2015) it asks the user for confirmation of the correct date.

This button doesn't do anything other than provide something to tab to.

Despite the label requesting a specific input format, users will inevitably ignore this and stick any old thing in it.

Days, months and years can be combined in any order and the script will in most cases deduce the correct date or ask for confirmation between two options.

Numbers can be separated with a - / . , or any other non-alphanumeric character.

Days can be entered as one or two digits & will work with or without st/nd/rd/th suffix.

Months can be entered as one or two digits, or spelt in full (case insensitive) or just the first 3 letters & handles people who spell February as Febuary.

Client side

View the source of this page for the commented javascript code. This can be minified to 2.6KB.

Server side

If your user base includes a lot of non-javascript users you could rewrite the client side code as server side, however I just use the following.:

// Get component parts

      if(preg_match('/^\d{4}-\d{2}-\d{2}$/',$DateVal) && checkdate($DateBits[1],$DateBits[2],$DateBits[0]))
// Full date
          $DateText=date('jS F Y',strtotime($DateVal));
      elseif(preg_match('/^\d{4}-\d{2}$/',$DateVal) && preg_match('/-(0[1-9]|1[0-2])$/',$DateVal))
// Year + month
// MySQL's date datatype handles months as yyyy-mm-00
          $DateText=date('F Y',strtotime($DateVal.'-01'));
      elseif(preg_match('/^\d{4}$/',$DateVal) && (int) $DateVal>1900)
// Year only
// MySQL's date datatype handles years as yyyy-00-00
// error
          $Feedback='The input date must be a valid date in the format yyyy-mm-dd, yyyy-mm or yyyy.';

// Return $Feedback to user if invalid or store $DateVal to date field & store $DateText to varchar field