The first international recommended posting date is for economy mail to all non-European destinations (except South Africa, the USA and Canada) should be sent by Saturday 5 October.
Saturday 5 October is also the deadline for economy Christmas mail to the Middle and Far East (except Hong Kong and Singapore). For those wanting to season’s greetings using the International Economy service to South Africa, Hong Kong, Singapore, the USA and Canada, cards and gifts should be sent no later than Saturday 12 October.
For the Eastern Europe, Greece, Cyprus, Turkey, Malta and Iceland mail using the Economy International service should be sent by Saturday 2 November. For those wishing to send festive greetings to friends and family in Western Europe by Economy International, will need to make sure everything is good to go by Saturday 16 November.
Source: Royal Mail