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You can design your own format patterns for dates and times from the list of symbols in the following table:Characters that are not letters are treated as quoted text. That is, they will appear in the formatted text even if they are no enclosed with single quotes.
Symbol Meaning Presentation Example G era designator Text AD y year Number 1996 M month in year Text & Number July & 07 d day in month Number 10 h hour in am/pm (1-12) Number 12 H hour in day (0-23) Number 0 m minute in hour Number 30 s second in minute Number 55 S millisecond Number 978 E day in week Text Tuesday D day in year Number 189 F day of week in month Number 2 (2nd Wed in July) w week in year Number 27 W week in month Number 2 a am/pm marker Text PM k hour in day (1-24) Number 24 K hour in am/pm (0-11) Number 0 z time zone Text Pacific Standard Time ' escape for text Delimiter (none) ' single quote Literal ' The number of symbol letters you specify also determines the format. For example, if "zz" pattern results in "PDT," then the "zzzz" pattern generates "Pacific Daylight Time." The following table summarizes these rules:
Presentation Number of Symbols Result Text 1 - 3 abbreviated form, if one exists Text >= 4 full form Number minimum number of digits is required shorter numbers are padded with zeros (for a year, if the count of 'y' is 2, then the year is truncated to 2 digits) Text & Number 1 - 2 text form Text & Number 3 number form