Call Date.now() inside Iron Router hook

help
1

I have a subscription inside my waitOn router hook, that takes a date as an argument:

waitOn: function() {
  var t = Date.now();
  var period = moment(t).subtract(1, 'days').valueOf();
  return Meteor.subscribe('posts', period);
}

the problem is, calling Date.now() makes the hook rerun infinitely.

I tried using _.once from the underscore library:

var t = _.once(function () { return Date.now(); });

but I can’t get it to work. It does not return the date.