6.4.15.3 SRFI-19 Date
A date object represents a date in the Gregorian calendar and a
time of day on that date in some timezone.
The fields are year, month, day, hour, minute, second, nanoseconds and
timezone. A date object is immutable, its fields can be read but they
cannot be modified once the object is created.
— Function:
date? obj
Return #t if obj is a date object, or #f if not.
— Function:
make-date nsecs seconds minutes hours date month year zone-offset
Create a new date object.
— Function:
date-nanosecond date
Nanoseconds, 0 to 999999999.
— Function:
date-second date
Seconds, 0 to 59, or 60 for a leap second. 60 is never seen when working
entirely within UTC, it's only when converting to or from TAI.
— Function:
date-minute date
Minutes, 0 to 59.
— Function:
date-hour date
Hour, 0 to 23.
— Function:
date-day date
Day of the month, 1 to 31 (or less, according to the month).
— Function:
date-month date
Month, 1 to 12.
— Function:
date-year date
Year, eg. 2003. Dates B.C. are negative, eg. -46 is 46
B.C. There is no year 0, year -1 is followed by year 1.
— Function:
date-zone-offset date
Time zone, an integer number of seconds east of Greenwich.
— Function:
date-year-day date
Day of the year, starting from 1 for 1st January.
— Function:
date-week-day date
Day of the week, starting from 0 for Sunday.
— Function:
date-week-number date dstartw
Week of the year, ignoring a first partial week. dstartw is the
day of the week which is taken to start a week, 0 for Sunday, 1 for
Monday, etc.
— Function:
current-date [
tz-offset]
Return a date object representing the current date/time, in UTC offset
by tz-offset. tz-offset is seconds east of Greenwich and
defaults to the local timezone.
— Function:
current-julian-day
Return the current Julian Day.
— Function:
current-modified-julian-day
Return the current Modified Julian Day.