Sundanese Wednesday which populared Rebo Nyunda is a program of tematic days in Bandung, West Java, Indonesia. Every Wednesday, every people in Bandung talk Sundanese in their communication and also wear Sundanese clothes. Bandung Government made this program to conserve Sundanese cultere as their local culture. Now, this program not only held in Bandung, but Garut and Bogor also held it.
References
Sundanese Wednesday Wikipedia(Text) CC BY-SA