Many thanks to SWLing Post contributor, Robert AK3Q, who shares the following information:

(Schedule Published on the Cumbre_DX group by Alokesh Gupta)

Special EDXC Broadcast 5-7 December

Rhein-Main-Radio-Club will be broadcasting on shortwave about EDXC – Conference at St.Petersburg.

Special QSL-Card for reception reports to RMRC [email protected] or by post Rhein-Main-Radio- Club e.V. , Postfach 700849, 60558 Frankfurt, Germany.

Via Lithuania:
5 December 0800-0900 on 11690 to Asia (Japan) in English
5 December 0900-1000 on 11690 to Russia in Russian.

Via WRMI, USA:
5 December at 2200-2300 on 11580 may be audible in Europe
6 December at 0100-0200 on 11580 may be audible in Europe
6 December at 2300-0000 on 5850 to North America
6 December at 0500-0600 on 9955 to Caribbean and Latin America
7 December at 2100-2200 on 7570 to North America. This may also be audible in Europe.
7 December at 2100-2200 on 15770 to Europe and North America. (DX-clusive via Lehtinen)
.
*(DX-Window No. 542, Danish Shortwave Club International) *

More information here:
https://edxcnews.wordpress.com/category/edxc-conference-2015/