Template:Certification Table Entry/Sales/HongKongPeriod/doc
|This is a documentation subpage for Template:Certification Table Entry/Sales/HongKongPeriod.|
It contains usage information, categories and other content that is not part of the original template page.
This helper template calculates periods for Belgian certifications, as stated in the following source:
-  - certification until 2006
-  - certification from October 2007
-  current certification.  showing it was active on Jan 2008,  showing it wasn't on Dec 2007, so change occurred Jan 2008.
There is no data for the interim period
|Before 2006||Before October 2007||Before 2008||From 2008|
Returns 0 if the data provided is insufficient