Description:
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Regular expression year4 conflicts with gnunocolon, and pointeddate2 with both timelong12 and timelong24.

Test script:
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<?php
echo date("Y-m-d H:i:s", strtotime("2460")) . "\n";	// year4 was used
echo date("Y-m-d H:i:s", strtotime("2011")) . "\n";	// gnunocolon was used
echo date("Y-m-d H:i:s", strtotime("20.02.99")) . "\n";	// pointeddate2 was used
echo date("Y-m-d H:i:s", strtotime("20.02.11")) . "\n";	// timelong24 was used

Expected result:
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Used single regular expression independently on date/time range

Actual result:
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2460-02-25 15:17:46
2011-02-25 20:11:00
1999-02-20 00:00:00
2011-02-25 20:02:11