Islamic coin dates

https://en.numista.com/catalogue/pieces1310.html

 Does anyone know when a coin, such as the above (United Arab Emirates 1 Dirham) has Western and Islamic dates on, does that country sometimes issue two coins for one Western year when the Islamic date changes within that same year (as the Islamic calendar is not 365 days)? Or the other way round also i.e. the Islamic year coincides with two Western years.
 I know there are 580 years between the two dates normally e.g. as on the above page
1415=1995 1425=2005 1426=2006 1428=2008 but then 1419=1998 on the same page.
So some years there is a lesser (or sometimes greater?) difference of years. I ask all this as in the photo below my coin has 1428=2007 on it whereas the above page says that 1428=2008
The page may just have a typing mistake, otherwise maybe an extra line needs to be added before the last entry to include the one shown ?

no you're right. the date translation here does not always function properly. We have to adjust
manually. I will change it to read "2007". but yes - Algeria is a good example of coins where
islamic year coincides with two western years. thanks
The arab letters in the comment were written after reading the wrong translated date

Not sure if I should create a new thread (same theme but different coin)

https://en.numista.com/catalogue/pieces2451.html

There are five lines that have different translation of years, so not sure which is right ...
 The conversion is
      0123456789
      ٠١٢٣٤٥٦٧٨٩

  1406 (1986) reads ١٤٠٤ – ١٩٨٦
The year 1406 is ١٤٠٦
and  ١٤٠٤  is 1404

 1419 (1999) reads ١٤١٩ - ١٩٩٨
The year 1999 is ١٩٩٩
and  ١٩٩٨  is 1998
 
 1425 (2004)  reads  ١٤٢٥ - ٢٠٠٥
The year 2004 is ٢٠٠٤
and  ٢٠٠٥  is 2005

 1426 (2005) reads  ١٤٢٦ – ٢٠٠٦
The year 2005 is  ٢٠٠٥
and  ٢٠٠٦  is 2006

 1427 (2006) reads  ١٤٢٧ - ٢٠٠٧
The year 2006 is   ٢٠٠٦
and  ٢٠٠٧  is 2007

Hope I typed those right !

corrected. hopefully  

Honestly, it's very interesting theme.