ISO 8601
HTML
| 1 | 2 | 3 | 4 | 5 |
|---|---|---|---|---|
| 1582-10-15 | 1582‑10‑15 | 1582‑10‑15 | <nobr>1582-10-15</nobr> | 1582-10-15 |
- @1 using - (U+002D hyphen-minus)
- @2 using "&#X;" with X=8209 (U+2011 non-breaking hyphen) - search for 1582-10-15 (method 1) possibly does not match
- @3 using the sign itself (U+2011 non-breaking hyphen) - search for 1582-10-15 (method 1) possibly does not match
- @4 using nobr-tag around method 1
- @5 using span style="white-space: nowrap;"
Glibc
http://www.gnu.org/software/libc/manual/html_node/Formatting-Calendar-Time.html
%F = %Y-%m-%d
PHP
http://php.net/manual/en/function.date.php
Y, m, d as in Glibc F differs from Glibc and means "A full textual representation of a month"