Under the entitlement under the Working Time Regulations 1998 (WTR 1998), SI 1998/1833, a worker is entitled to 5.6 weeks’ paid annual leave, comprising: • a basic entitlement of four weeks’ annual paid leave, implementing the right under Directive 2003/88/EC, the Working Time Directive (WTD) • an additional entitlement of 1.6 weeks’ annual leave, which is a right under WTR 1998 only For detailed information on the right to paid annual leave, see Practice Notes: Holiday and Holiday pay. Holiday entitlement for shift workers In the case of workers with regular working hours, calculating the annual leave entitlement in terms of days is a relatively straightforward exercise, ie: • a full-time worker who works five days a week is entitled to 5.6 x 5 =28 days • a part-time worker who works three days a week is entitled