age worry

Brief moment of worry over my age when completing my profile - it told me I was 31. Then realised the birthday date input was in American format and I am now restored to 30 - phew. Always been a problem with a December birthday - in 2003 I was not 30 and now I am. Not that it bothers me or anything. Someone told me that "men come into their own in their 30s" and I had to refrain from saying that I had been coming into my own since about the age of 11.