// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ****************************************************************************** * Copyright (C) 2003-2013, International Business Machines Corporation * and others. All Rights Reserved. ****************************************************************************** * * File HEBRWCAL.H * * Modification History: * * Date Name Description * 05/13/2003 srl copied from gregocal.h * 11/26/2003 srl copied from buddhcal.h ****************************************************************************** */ #ifndef HEBRWCAL_H #define HEBRWCAL_H #include "unicode/utypes.h" #if !UCONFIG_NO_FORMATTING #include "unicode/calendar.h" #include "unicode/gregocal.h" U_NAMESPACE_BEGIN /** * <code>HebrewCalendar</code> is a subclass of <code>Calendar</code> * that that implements the traditional Hebrew calendar. * This is the civil calendar in Israel and the liturgical calendar * of the Jewish faith worldwide. * <p> * The Hebrew calendar is lunisolar and thus has a number of interesting * properties that distinguish it from the Gregorian. Months start * on the day of (an arithmetic approximation of) each new moon. Since the * solar year (approximately 365.24 days) is not an even multiple of * the lunar month (approximately 29.53 days) an extra "leap month" is * inserted in 7 out of every 19 years. To make matters even more * interesting, the start of a year can be delayed by up to three days * in order to prevent certain holidays from falling on the Sabbath and * to prevent certain illegal year lengths. Finally, the lengths of certain * months can vary depending on the number of days in the year. * <p> * The leap month is known as "Adar 1" and is inserted between the * months of Shevat and Adar in leap years. Since the leap month does * not come at the end of the year, calculations involving * month numbers are particularly complex. Users of this class should * make sure to use the {@link #roll roll} and {@link #add add} methods * rather than attempting to perform date arithmetic by manipulating * the fields directly. * <p> * <b>Note:</b> In the traditional Hebrew calendar, days start at sunset. * However, in order to keep the time fields in this class * synchronized with those of the other calendars and with local clock time, * we treat days and months as beginning at midnight, * roughly 6 hours after the corresponding sunset. * <p> * If you are interested in more information on the rules behind the Hebrew * calendar, see one of the following references: * <ul> * <li>"<a href="http://www.amazon.com/exec/obidos/ASIN/0521564743">Calendrical Calculations</a>", * by Nachum Dershowitz & Edward Reingold, Cambridge University Press, 1997, pages 85-91. * * <li>Hebrew Calendar Science and Myths, * <a href="http://www.geocities.com/Athens/1584/"> * http://www.geocities.com/Athens/1584/</a> * * <li>The Calendar FAQ, * <a href="http://www.faqs.org/faqs/calendars/faq/"> * http://www.faqs.org/faqs/calendars/faq/</a> * </ul> * <p> * @see com.ibm.icu.util.GregorianCalendar * * @author Laura Werner * @author Alan Liu * @author Steven R. Loomis * <p> * @internal */ class U_I18N_API HebrewCalendar : public Calendar { … }; U_NAMESPACE_END #endif /* #if !UCONFIG_NO_FORMATTING */ #endif //eof
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