Determine number of days (not including weekend) based on hours given...

How to change the default time zone in R?...

Compute time between two date type string to get years in R...

Possible bug in `difftime` - calculating difference in date time in R...

POSIXct times around DST?...

How to pass a parameter into a date function...

How to aggregate data from multiple years on MM-DD, ignoring year...

Number of days between two dates - ANSI SQL...

How to accurately calculate person's age in a perform screen...

Calculate age (year, month, day) using DateDiff in stored procedure...

Adding days avoiding weekends...

How to calculate night and day working hours...

Adding dates by week produces wrong date. Why is this happening?...

Get the last day of the current year as date...

How to calculate employment year based on hire date in MS Access...

Oracle SQL - convert a varchar2 into a date...

Calculate business days in Oracle SQL(no functions or procedure)...

Bad format for date, time, timestamp or interval literal in Oracle...

Averaging by time intervals for preceding 5-min bin from datetime...

Fill missing date values in column by adding delivery interval to another date column...

Date function on oracle...

How to add a day with a specific date using add_months function...

R - new column with values assigned depending on month...

Fill in missing year in ordered list of dates...

Joda Time - Get all weeks of a year...

SQL: Get Friday of Second Full Week of Month...

mysql result from table1 where table2 doesn't match AND between start_datetime and start_datetim...

Get last Friday and Get next Thursday...

UPDATE month and year to current but leave day...

How can I make a program that reads the date(hour,minutes,seconds) then it subtracts it from the sec...