Calendar entry defaulting to previous day

[WPCentral Question]

I am entering dates on Windows 10 Calendar (all day events like birthdays etc) and as soon as I press enter the entry appears on the previous day and the dates are changed in the details. I have tried it with no notifications and it still comes up on the wrong day. I have checked the region in time and date settings and it is correct. If I enter a time eg 8am it retains the correct date. Is there a setting that I am missing - it is very frustrating as I want to set up a number of dates for the year in my diary but they will all be wrong unless I put a time against them....

Has anybody had similar issue and found a solution - would love to hear from you...