I don't think there is such as thing as a "metric month". The metric unit of time - more precisely, the SI unit of time - is simply the second. In the Gregorian calendar, a month can have 28, 29, 30 or 31 days. You can use the length of the year - for example, the average Gregorian year has 365.2425 days - and divide that by 12, to get the average length of the month.
I don't know all, but here are some: kilo, milli, deca, and centi. Metric notation is used for dates. The format is year month day. For example, April 17, 2012 becomes 2012 04 17 or 12 04 17.
day, month and year
Month: Mois Year: Année Date: date
month day year
In todays notation of Roman numerals: MCMLXXXV
5,800,000,000,000 miles in Scientific Notation = 5.8 x 1012 miles.
in britian,its day/month/year of birth.
Year-Month-Day
in britian,its day/month/year of birth.
MM/DD/YYYY
5.8787 x 1012 miles 5,878,700,000,000 miles