match: \d{2}(\d{2})?([/-])\d{2}\2(?(1)\d{2}|\d{4})
what: matches strings (ostensibly dates) in the format of xx-xx-xx or xx xx-xx-xx, using either / or - for separators.
why: custom syntax highlighting in sublime text.

seen from Germany
seen from China
seen from United States

seen from Singapore

seen from United Kingdom
seen from Malaysia

seen from Saudi Arabia

seen from United States
seen from Germany
seen from United States

seen from Malaysia
seen from China

seen from United States
seen from United Kingdom
seen from Canada
seen from United States
seen from China
seen from Japan

seen from Germany
seen from Singapore
match: \d{2}(\d{2})?([/-])\d{2}\2(?(1)\d{2}|\d{4})
what: matches strings (ostensibly dates) in the format of xx-xx-xx or xx xx-xx-xx, using either / or - for separators.
why: custom syntax highlighting in sublime text.