Megan & I have both reported dash not working. I believe the issue started on 13-12 and affects people who think that is the right way to format a date.
The js error is
Uncaught TypeError: Cannot set property '12' of undefined(…)
scripts-08cc818a.js:111 Uncaught TypeError: Cannot set property '12' of undefined(…)
And the undefined var is the %m in e.data.xFormat="%Y-%m-%d
Here is more of the line for context. Unfortunately it is ann minified
{columns:s,groups:[t.totalGroups,t.countGroups],colors:a}):(a[t.totals[0]]="rgb(92,184,92)",a[t.counts[0]]="#f0ad4e",o[t.totals[0]]="y",o[t.counts[0]]="y2",e.data={columns:[t.xs,t.totals,t.counts],colors:a}),e.data.x="x",e.data.type="bar",e.data.xFormat="%Y-%m-%d %H",e.data.axes=o,r.xByYChart(!1),r.xByYChart(e),r.chartLoaded(!0)},r.showPanelBody=function(t){$("#"+t+"body").toggleClass("hide")},r.presetTitles=t.observableArray(["This does not work yet.","Donations During Big English 2015","Donations for Fiscal Year 2015"]),