All your normal salary:
full pay
Not working at your office but at your house:
home-working
A system of working a particular number of hours each week or month but choosing when you start and finish:
flexitime
The times when you always have to work:
core hours
Extra days off:
additional leave
The number of days off for holidays per year:
annual leave
An official rate of pay according to the law:
statutory pay
Time off for men to spend time with a new baby.
paternity leave
Time at work in addition to your normal hours:
overtime
Time off with no money:
unpaid leave