Multiplier Datetime field output behavior

[Werner Pilnei]

I have a couple of datetime fields wrapped in a multiplier field. I put in 02.01.2016 , the output is 02.01.2015. This happens only up to the 3rd of January 2016, with the 4th of January the output is okay again (04.01.2016). Checking the database entry shows the correct date (02.01.2016). See also the attached picture of the input, database and the output. Any idea what's happening here?

[Werner Pilnei]

Solved - my fault -sorry:

This was wrong $dateFormattedDatum = strftime("%d.%m.%G", $date);

this does it correct: $dateFormattedDatum = strftime("%d.%m.%Y", $date);