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Date format string syntax

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iCalamus uses the ICU Date Format string syntax which is described in detail as follows.

The date/time format is specified by means of a string time pattern. The count of pattern letters determines the format. In this pattern, letters are reserved as pattern letters:

Table 1: ICU Date format
Symbol Meaning Presentation Example
G era designator (Text) AD
y year (Number) 1996
M month in year (Text + Number) July and 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
'' single quote '
Text
Four or more, use full form, <4, use short or abbreviated form if it exists (for example, 'EEEE' produces 'Monday', 'EEE' produces 'Mon').
Number
The minimum number of digits. Shorter numbers are zero-padded to this amount (for example, if 'm' produces '6', 'mm' produces '06'). Year is handled specially; that is, if the count of 'y' is 2, the Year will be truncated to 2 digits. (for example, if 'yyyy' produces '1997', 'yy' produces '97'.)
Text + Number
Three or over, use text, otherwise use number. (for example, 'M' produces '1', 'MM' produces '01', 'MMM' produces 'Jan', and 'MMMM' produces 'January'.)

Pobyt: Any characters in the pattern that are not in the ranges of ['a'..'z'] and ['A'..'Z'] will be treated as quoted text. For instance, characters like ':', '.', ' ', '#' and '@' will appear in the resulting time text even they are not enclosed within single quotes.
A pattern containing any invalid pattern letter results in an error.

Table 2: ICU Date Format samples
Format Pattern Result
yyyy.MM.dd G 'at' HH:mm:ss Z 1996.07.10 AD at 15:08:56 PDT
EEE, MMM d, ''yy Wed, July 10, '96
h:mm a 8:08 PM
hh 'o''clock' a, ZZZZ 09 o'clock AM. Eastern Standard Time
K:mm a, Z 9:34 AM, PST
yyyy.MMMM.dd GGG hh:mm aaa 1996.July.10 AD 12:08 PM

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