cajeta.time.DateTimeFormatter — formats temporal values to text, modeled on java.time.format.DateTimeFormatter. Two ways to get one: ofStandard with a standard FormatStyle, or ofPattern with a printf/strftime-style pattern (%Y year, %m month, %d day, %H hour24, %I hour12, %M minute, %S second, %p AM/PM, %b/%B short/full month, %a/%A short/full weekday, %z/%Z offset, %f/%L 9-/3-digit fraction, %% literal %). The formatter is immutable — it holds only its pattern string and parses it on each format call. Render with formatDate / formatTime / formatDateTime / formatZoned; output is an owned #String, text is English.

DateTimeFormatter fmt #= DateTimeFormatter.ofPattern("%Y-%m-%d %H:%M:%S");
LocalDateTime dt = LocalDateTime.of(2026, 6, 8, 14, 30);
String text #= fmt.formatDateTime(dt);   // "2026-06-08 14:30:00"

Methods

Signature
`DateTimeFormatter(String pattern)`	Wraps a raw strftime `pattern`
`static #DateTimeFormatter ofPattern(String pattern)` ⚑	A formatter for a strftime-style pattern
`static #DateTimeFormatter ofStandard(FormatStyle style)` ⚑	A formatter for a standard `FormatStyle`
`String getPattern()`	The underlying pattern string
`#String format(DateTimeFields f)`	Render the `DateTimeFields` `f` by parsing this formatter’s pattern
`#String formatDate(LocalDate d)`	Format a `LocalDate` (date fields only)
`#String formatTime(LocalTime t)`	Format a `LocalTime` (time-of-day fields only)
`#String formatDateTime(LocalDateTime t)`	Format a zone-naive `LocalDateTime` (no offset)
`#String formatZoned(ZonedDateTime z)`	Format a `ZonedDateTime` — the offset codes `%z` / `%Z` become available

⚑ = @EntryPoint

DateTimeFormatter

Methods

See also