This template is used on many pages and changes may be widely noticed. Test changes in the template's /sandbox or /testcases subpages, or in your own user subpage. Consider discussing changes on the talk page before implementing them.
The type of the DOW designation (symbol, abbr, name, code, number) or the length of its abbreviation (1–3 letters, full) is specified by the first parameter.
2
If a header table cell is desired, a literal exclamation mark ! must be supplied as a second parameter
3 = width
The cell and hence column width (HTML syntax, not CSS)
4 = title
The hover tip for the cell defaults to the full name in English, but can be set explicitly.
