The tradition was initiated by crown princess Mary and crown prince Frederik of Denmark in 2009, inspired by Australia; Mary's country of birth.
Liberals for Forests | Cuban moist forests | Vanuatu rain forests | Madagascar lowland forests | Madagascar dry deciduous forests | High Sheriff of Nottinghamshire, Derbyshire and the Royal Forests | Cuban pine forests | Upper Gangetic Plains moist deciduous forests | Trinidad and Tobago dry forests | Society for the Protection of New Hampshire Forests | Sierra Madre Oriental pine-oak forests | Marine protected areas are one way to guard kelp forests as an ecosystem. The nudibranch ''Melibe leonina | Lower Guinean forests | International Day of Forests | Deccan thorn scrub forests | Comoros forests |