Time

asFreq	Convert X to specified frequency.
businessDay	If X is a business day (Monday to Friday), return date(X).
businessMonthBegin	Return the first business day (Monday to Friday) of the month that X belongs to.
businessMonthEnd	Return the last business day (Monday to Friday) of the month that X belongs to.
businessQuarterBegin	Return the first business day (Monday to Friday) of the quarter that X belongs to.
businessQuarterEnd	Return the last day of the quarter that X belongs to.
businessYearBegin	Return the first business day (Monday to Friday) of the year that X belongs to and that starts in the month of startingMonth.
businessYearEnd	Return the last business day (Monday to Friday) of the year that X belongs to and that ends in the month of endingMonth.
concatDateTime	Combine date and time into one new variable.
date	Convert X into DATE type.
dayOfMonth	Return the day of the month for each element in X.
dayOfWeek	Return which day of the week is X.
dayOfYear	Return the day of the year for each element in X.
daysInMonth	Return the number of days in the month for each element in X.
convertTZ	Convert obj from time zone srcTZ to time zone destTZ.
fy5253	Using the 52-53 weeks in a fiscal year (4-4-5 calendar), it returns the start date of fiscal year which includes X.
fy5253Quarter	Using the 52-53 week in fiscal year (4-4-5 calendar), this function returns the start date of fiscal year which includes X.
gmtime	Convert X from local time zone to GMT (Greenwich Mean Time).
hour	Return the corresponding hour(s).
hourOfDay	For each element in X, return a number from 0 to 23 indicating which hour of the day it falls in.
isLeapYear	Determine if each element in X is in a leap year.
isMonthEnd	Determine if each element in X is the last day of a month.
isMonthStart	Determine if each element in X is the first day of a month.
isQuarterEnd	Determine if each element in X is the last day of a quarter.
isQuarterStart	Determine if each element in X is the first day of a quarter.
isYearEnd	Determine if each element in X is the last day of a year.
isYearStart	Determine if each element in X is the first day of a year.
lastWeekOfMonth	In the calendar month of X, suppose the last "weekday" is d.
microsecond	For each element in X, return a number from 0 to 999999 indicating which microsecond of the second it falls in.
millisecond	For each element in X, return a number from 0 to 999 indicating which millisecond of the second it falls in.
minuteOfHour	For each element in X, return a number from 0 to 59 indicating which minute of the hour it falls in.
month	Return the corresponding month(s).
monthBegin	Return the first day of the month that X belongs to.
monthEnd	Return the last day of the month that X belongs to.
monthOfYear	For each element in X, return a number from 1 to 12 indicating which month of the year it falls in.
nanosecond	For each element in X, return a number indicating which nanosecond of the second it falls in.
now	Return the current timestamp.
quarterBegin	Return the first day of the quarter that X belongs to.
quarterEnd	Return the first day of the quarter that X belongs to.
secondOfMinute	For each element in X, return a number from 0 to 59 indicating which second of the minute it falls in.
semiMonthBegin	Return the first day of the semi-month that X belongs to.
semiMonthEnd	Suppose X is the d-th day of the month:
temporalAdd	Add a value to a temporal variable.
temporalSeq	Resample the time series between start and end based on the frequency specified by rule.
today	Return the current date.
transFreq	For each element of X, conduct a transformation as specified with parameter rule.
weekday	eturn integer(s) to represent of the corresponding weekday(s) of X.
weekBegin	For each element of X, return the first date of the week that it belongs to and that starts on the day as specified by parameter weekday.
weekEnd	For each element of X, return the last date of the week that it belongs to and that ends on the day as specified by parameter weekday.
weekOfMonth	In the calendar month of X, suppose the "week"-th "weekday" is d.
weekOfYear	Return the week number for X.
year	Return the corresponding year(s).
yearBegin	Return the first day of the year that X belongs to and that starts in the month of startingMonth.
yearEnd	Return the last day of the year that X belongs to and that ends in the month of endingMonth.