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## Function operator-=

boost::local_time::operator-=

## Synopsis

    // In header: <boost/date_time/local_time/date_duration_operators.hpp>

    local_date_time
    operator-=(local_date_time & t, const boost::gregorian::years & y);

## Description

Subtracts a years object from a local_date_time. Result will be same month and day-of-month as local_date_time unless original day was the last day of month. see date_time::years_duration for more details