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Apache POI - Java API To Access Microsoft Format Files

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/* ====================================================================
   Licensed to the Apache Software Foundation (ASF) under one or more
   contributor license agreements.  See the NOTICE file distributed with
   this work for additional information regarding copyright ownership.
   The ASF licenses this file to You under the Apache License, Version 2.0
   (the "License"); you may not use this file except in compliance with
   the License.  You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.
==================================================================== */

package org.apache.poi.ss.usermodel;

import org.apache.poi.util.Internal;

@Internal
public interface Date1904Support {
    /**
     * Gets a boolean value that indicates whether the date systems used in the workbook starts in 1904.
     * 
     * The default value is false, meaning that the workbook uses the 1900 date system,
     * where 1/1/1900 is the first day in the system.
     *
     * 1904 based dates are only supported in XSSF workbooks.
     * 
     * @return true if the date systems used in the workbook starts in 1904
     */
    boolean isDate1904();
}