Simply add the following to your config/config.php file, setting the DATE_START_YEAR to (in your case) 2014.
# year ranges. If you use dates, by default the drop down for year will be from
# three years before until 10 years after this the current value for year. If there
# is no current value the current year will be used.
# if you want to use a bigger range you can set the start and end year here
# be aware that the drop down may become very large.
# if set to 0 they will use the default behaviour. So I'm afraid you can't start with
# year 0. Also be aware not to set the end year to something relatively soon in the
# future, or it will stop working when you reach that year.