Sick leave (or sickness pay or sick pay) is an employee benefit in the form of paid leave which can be taken during periods of sickness.

Procedures on sickness absence reporting

Parental leave
Personal leave
Family leave
Bereavement leave Other related forms leave
Also called compassionate leave is given to an employee whose immediate (close) family member has died. This also includes the day of the funeral. Compassionate leave can also apply if the employee's immediate (close) family member is very ill.
Immediate (close) family members include:
Compassionate leave lengths
NOTE - The lengths can vary depending on which place or firm you work for.
Additional time off work must be taken as annual leave/flexi day/off sick (check with your line manager to be absolutely sure)

Parent (mother/father)
Mother/father in-law
Brother
Sister
Spouse (husband/wife/partner)
Children (son/daughter) - It can also apply to miscarriage/stillbirth/neonatal death
Grandparent
Category 1 (Parents, children, spouse) - 3 days (including day of the funeral)
Category 2 (Siblings, grandparents) - 1 day (day of the funeral)
Other relatives e.g. aunties, uncles, cousins, great aunties, great uncles and friends - no compassionate leave granted (if you wish to attend the funeral it must be either be taken as annual leave or as a flexi day) Bereavement leave
Sick leave has its origins in trade union campaigns for its inclusion in industrial agreements. In Australia, it was introduced into "industrial awards" in 1922 [1]

History
Casual leave is a variation of sick leave. It is leave from work for reasons other than medical, long service, holiday or family reasons. Casual leave is paid leave for any reasonable reason.

Povisions in Different Countries

Vacation
Parental leave
Labour and employment law
Employee benefit
Long service leave