National Day of Tourism Dimanche 29 Août 2010 (la date change selon les années)
*Dedicated to the first organized and mass climbing of the "Cherni Vruh" peak in the Vitosha Mountain near Sofia.
The mass climbing has taken place on August 27, 1985 after the famous Bulgarian writer Aleko Konstantinov publishes his article and invitation under the title "To the Sofia Lovers of Bulgarian Nature."