1 files changed, 2 insertions, 0 deletions
diff --git a/datetime.cc b/datetime.cc
index cf26d0c9..f5d071c3 100644
--- a/datetime.cc
+++ b/datetime.cc
@@ -34,6 +34,8 @@ const char * formats[] = {
   NULL
 };
 
+std::string datetime_t::date_format = "%Y/%m/%d";
+
 std::time_t interval_t::first(const std::time_t moment) const
 {
   std::time_t quant = begin;