change date format according to user settings to yyyymmdd format

Hi ,

For a user he can set the default date format as any one one of the following (USDEFAULTS-DATFM):

DD.MM.YYYY

MM/DD/YYYY

MM-DD-YYYY

YYYY.MM.DD

YYYY/MM/DD

YYYY-MM-DD

GYY.MM.DD (Japanese Date)

GYY/MM/DD (Japanese Date)

GYY-MM-DD (Japanese Date)

YYYY/MM/DD (Islamic Date 1)

YYYY/MM/DD (Islamic Date 2)

YYYY/MM/DD (Iranian Date)

But what ever be the format I want to convert into yyyymmdd format .Is there any FM availabl for this?

Please suggest.

Regards,

Sreeja