WhatsApp date format is invalid

I'm using WhatsApp for a while.. and I've noticed that in the past day, the date format that whatsapp uses is invalid.

Instead of showing it as Day/Month/Year, it shows it as Month/Day/Year (Like the date in the US).

I live in Israel, and therefor, want to see it as d/m/y...

I've checked my date settigns on my phone, and it says dates are formated as :
31/12/2014

Also, in my SMS/Phone apps, my dates are normal (for example: 08/10/2014, and not 10/08/2014), and only in WhatsApp the dates are opposite.

Why is that? How can I fix that?

Thanks!