Well done! this is one of the best "Show HN" posts I've seen. Solving a simple & actual problem, and not needing to specify what language or framework you used as justification for it. I really wish more posts were like this.

I wish I could click a keyword in a conference list and then see more conferences with that keyword.

Also, the top date menu is confusing for me. I actually thought for a while the 18 was for Day of month, not year. But at least year makes more sense than some ranges that would end mid-month.

I tinkered and came up with two alternatives (I like the bottom one more) http://i.imgur.com/P0sz1aA.png

Keep up the great work!