class DateCheckFilter extends AbstractDateCheckFilter {

  @Override
  protected Calendar getCalendar() {
    return Calendar.getInstance(Locale.forLanguageTag("uk"));
  }

  @Override
  protected int getDayOfWeek(String dayStr) {<FILL_FUNCTION_BODY>}

  @Override
  protected String getDayOfWeek(Calendar date) {
    return date.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.LONG, Locale.forLanguageTag("uk"));
  }

  @Override
  protected int getMonth(String monthStr) {
    String mon = monthStr.toLowerCase();
    if (mon.startsWith("сі")) return Calendar.JANUARY + 1;
    if (mon.startsWith("лю")) return Calendar.FEBRUARY + 1;
    if (mon.startsWith("бе")) return Calendar.MARCH + 1;
    if (mon.startsWith("кв")) return Calendar.APRIL + 1;
    if (mon.startsWith("тр")) return Calendar.MAY + 1;
    if (mon.startsWith("че")) return Calendar.JUNE + 1;
    if (mon.startsWith("ли")) return Calendar.JULY + 1;
    if (mon.startsWith("се")) return Calendar.AUGUST + 1;
    if (mon.startsWith("ве")) return Calendar.SEPTEMBER + 1;
    if (mon.startsWith("жо")) return Calendar.OCTOBER + 1;
    if (mon.startsWith("ли")) return Calendar.NOVEMBER + 1;
    if (mon.startsWith("гр")) return Calendar.DECEMBER + 1;
    throw new RuntimeException("Could not find month '" + monthStr + "'");
  }

}

    String day = dayStr.toLowerCase();
    if (day.startsWith("по") || day.equals("пн")) return Calendar.MONDAY;
    if (day.startsWith("ві") || day.equals("вт")) return Calendar.TUESDAY;
    if (day.startsWith("се") || day.equals("ср")) return Calendar.WEDNESDAY;
    if (day.startsWith("че") || day.equals("чт")) return Calendar.THURSDAY;
    if (day.startsWith("п'") || day.startsWith("п’") || day.equals("пт")) return Calendar.FRIDAY;
    if (day.startsWith("су") || day.equals("сб")) return Calendar.SATURDAY;
    if (day.startsWith("не") || day.equals("нд")) return Calendar.SUNDAY;
    throw new RuntimeException("Could not find day of week for '" + dayStr + "'");
  
<methods>public non-sealed void <init>() ,public org.languagetool.rules.RuleMatch acceptRuleMatch(org.languagetool.rules.RuleMatch, Map<java.lang.String,java.lang.String>, int, org.languagetool.AnalyzedTokenReadings[], List<java.lang.Integer>) <variables>protected static final java.util.regex.Pattern DAY_OF_MONTH_PATTERN,private static final Logger logger