Function mjdToDate( mjd )

Description:
Converts a Modified Julian Date value to an ISO 8601-format date string. The output format is yyyy-mm-dd.
Parameters:
mjd (floating point)
modified Julian date
Return Value (String):
ISO 8601 format date corresponding to mjd
Example:
mjdToDate(53551.72917) = "2005-06-30"
Signature:
String mjdToDate(double)