cat ~/.gnome/GnomeCard.gcrd | vcf2birthday.pl | birthday -f -
.TH vcf2birthday 1
.SH NAME
vcf2birthday \- Convert VCARD files to birthday database
.SH DESCRIPTION
The 
.B vcf2birthday
command reads a VCARD file from the standard input, and outputs a birthday-compatible database.
.SH EXAMPLE
cat ~/.gnome/GnomeCard.gcrd | vcf2birthday.pl | birthday -f -
.SH SEE ALSO
.BR birthday (1)