Hi, I am MATSUDA Daiki and work at Miracle Linux in Japan, which company
provides the support for Zabbix!

In Zabbix 1.8.16, frontend does not display date correctly in Japanese and other some languages.
So, I fixed it and patch is attached.

In original.png, the date is displayed without year and day unit. But the month unit is correct.
Becase they, month names, are translated with month unit.
So, I fix the date generating function to add year, month and day unit and I remove month unit from translated words.
In addition, add translation for all language you support.

See fixed.png