Of course, there are different ways to write the date. However, I recommend the following ways:
10 January 2015 (UK)
January 10, 2015 (US) – with a comma after the figure!
I suggest that you don’t write the date like this: 10.01.2015. For me it means 10 January 2015 but for an American it would mean 1 October. And I find that very confusing! 😉