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diff --git a/src/main/java/at/knowcenter/wag/egov/egiz/pdf/EGIZDate.java b/src/main/java/at/knowcenter/wag/egov/egiz/pdf/EGIZDate.java
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+/**
+ * <copyright> Copyright (c) 2006 by Know-Center, Graz, Austria </copyright>
+ * 
+ * This software is the confidential and proprietary information of Know-Center,
+ * Graz, Austria. You shall not disclose such Confidential Information and shall
+ * use it only in accordance with the terms of the license agreement you entered
+ * into with Know-Center.
+ * 
+ * KNOW-CENTER MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF
+ * THE SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR
+ * NON-INFRINGEMENT. KNOW-CENTER SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY
+ * LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
+ * DERIVATIVES.
+ * 
+ * $Id: EGIZDate.java,v 1.1 2006/10/31 08:08:33 wprinz Exp $
+ */
+package at.knowcenter.wag.egov.egiz.pdf;
+
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ * Represents a signature date and the signing time as can be found in the
+ * SIG_DATE field.
+ * 
+ * <p>
+ * This is used to compare date values of signatures.
+ * </p>
+ * 
+ * @author wprinz
+ */
+public class EGIZDate
+{
+
+  /**
+   * The year.
+   */
+  protected int year;
+
+  /**
+   * The month.
+   */
+  protected int month;
+
+  /**
+   * The day.
+   */
+  protected int day;
+
+  /**
+   * The hour.
+   */
+  protected int hour;
+
+  /**
+   * The minute.
+   */
+  protected int minute;
+
+  /**
+   * The second.
+   */
+  protected int second;
+
+  /**
+   * Constructor that fills the date with values.
+   * 
+   * @param year
+   *          The year.
+   * @param month
+   *          The month.
+   * @param day
+   *          The day.
+   * @param hour
+   *          The hour.
+   * @param minute
+   *          The minute.
+   * @param second
+   *          The second.
+   */
+  public EGIZDate(int year, int month, int day, int hour, int minute, int second)
+  {
+    this.year = year;
+    this.month = month;
+    this.day = day;
+    this.hour = hour;
+    this.minute = minute;
+    this.second = second;
+  }
+
+  /**
+   * Parses the date information from a given date value.
+   * 
+   * <p>
+   * Usually the date value is one extracted from the value of the SIG_DATE
+   * field.
+   * </p>
+   * 
+   * @param date_value
+   *          The date value String.
+   * @return Returns the parsed EGIZDate. An IllegalArgumentException is thrown
+   *         if the date String has an illegal format.
+   */
+  public static EGIZDate parseFromString(String date_value)
+  {
+    // find the according RFC standard and cite it
+    
+    // BKU writes a Z after the date for some reason.
+    Pattern date_pattern = Pattern.compile("^\\d\\d\\d\\d-\\d\\d-\\d\\dT\\d\\d:\\d\\d:\\d\\d[Z]?$");
+    Matcher date_matcher = date_pattern.matcher(date_value);
+    if (!date_matcher.matches())
+    {
+      throw new IllegalArgumentException("The date_value (" + date_value + " has an illegal format.");
+    }
+    // for some strange reasons capture groups don't work
+
+    int year = Integer.parseInt(date_value.substring(0, 4));
+    int month = Integer.parseInt(date_value.substring(5, 7));
+    int day = Integer.parseInt(date_value.substring(8, 10));
+    int hour = Integer.parseInt(date_value.substring(11, 13));
+    int minute = Integer.parseInt(date_value.substring(14, 16));
+    int second = Integer.parseInt(date_value.substring(17, 19));
+
+    return new EGIZDate(year, month, day, hour, minute, second);
+  }
+
+  /**
+   * @see java.lang.Object#equals(java.lang.Object)
+   */
+  public boolean equals(Object obj)
+  {
+    if (!(obj instanceof EGIZDate))
+    {
+      return false;
+    }
+
+    return toString().equals(obj.toString());
+  }
+
+  /**
+   * @see java.lang.Object#hashCode()
+   */
+  public int hashCode()
+  {
+    return toString().hashCode();
+  }
+
+  /**
+   * @see java.lang.Object#toString()
+   */
+  public String toString()
+  {
+    return "parsed date = " + year + "-" + month + "-" + day + "T" + hour + ":" + minute + ":" + second;
+  }
+
+  /**
+   * Converts the date to a long integer.
+   * 
+   * <p>
+   * An earlier date is lower than a later date.
+   * </p>
+   * <p>
+   * E.g. a date in 1999 will get a smaller number than a date in 2006.
+   * </p>
+   * 
+   * @return Returns the compareable long.
+   */
+  protected long toCompareableLong()
+  {
+    return +this.year * 12 * 31 * 24 * 60 * 60 + this.month * 31 * 24 * 60 * 60 + this.day * 24 * 60 * 60 + this.hour * 60 * 60 + this.minute * 60 + this.second;
+  }
+
+  /**
+   * Compares this EGIZDate to another EXIZDate.
+   * 
+   * @param other
+   *          The other EGIZDate.
+   * @return Returns negative if this date is earlier (lower) than the other
+   *         date. Returns 0 if both dates are equal. Returns positive if this
+   *         date is later (higher) than the other date.
+   */
+  public int compareTo(EGIZDate other)
+  {
+    long diff = toCompareableLong() - other.toCompareableLong();
+    return (int) diff;
+  }
+
+}