[fix #876] Fix current date filters.
[fix #876] Fix current date filters.

mozilla/snippets-service,glogiotatidis/snippets-service,mozilla/snippets-service,mozmar/snippets-service,glogiotatidis/snippets-service,mozmar/snippets-service,glogiotatidis/snippets-service,mozmar/snippets-service,mozmar/snippets-service,mozilla/snippets-service,glogiotatidis/snippets-service,mozilla/snippets-service