[[schedule-yearly]]
==== Yearly Schedule

A <<trigger-schedule, `schedule`>> that triggers at a specific day and time
every year. To use the `yearly` schedule, you specify the month, day, and time
(or months, days, and times) when you want the scheduler to start the watch
execution with the `in`, `on`, and `at` attributes.

You can specify the month by name, abbreviation, or number:

* `january`, `february`, `march`, `april`, `may`, `june`, `july`,
  `august`, `september`, `october`, `november` and `december`

* `jan`, `feb`, `mar`, `apr`, `may`, `jun`, `jul`, `aug`,
  `sep`, `oct`, `nov` and `dec`

* `1`, `2`, `3`, `4`, `5`, `6`, `7`, `8`, `9`, `10`, `11` and `12`

You specify the day of month as a numeric value between `1` and `31` (inclusive).
The Times are specified in the form `HH:mm` on a 24-hour clock. You can also use
the reserved values `midnight` and `noon` for `00:00` and `12:00`.

===== Configuring a Yearly Schedule

To configure a once a year schedule, you specify the month with the `in` attribute,
the day with the  `on` attribute, and the time with the `at` attribute. For
example, the following `yearly` schedule triggers once a year at noon on January
10th:

[source,js]
--------------------------------------------------
{
  "trigger" : {
    "schedule" : {
      "yearly" : { "in" : "january", "on" : 10, "at" : "noon" }
    }
  }
}
--------------------------------------------------

NOTE: You can also specify the month, day, and time with the `month`, `day`, and
      `time` attributes, they are interchangeable with `in`, `on`, and `at`.

===== Configuring a Multiple Times Yearly Schedule

To configure a `yearly` schedule that triggers multiple times a year, you can
specify an array of month, day, and time values. For example, the following
`yearly` schedule triggers twice a year: at noon on January 10th, and at 5:00 PM
on July 20th.

[source,js]
--------------------------------------------------
{
  "trigger" : {
    "schedule" : {
      "yearly" : [
        { "in" : "january", "on" : 10, "at" : "noon" },
        { "in" : "july", "on" : 20, "at" : "17:00" }
      ]
    }
  }
}
--------------------------------------------------

Alternatively, you can specify the months, days, and times in an object that has
`in`, `on`, and `minute` attributes that contain an array of values. For example,
the following `yearly` schedule triggers at 12:00 AM and 12:00 PM on January 10th,
January 20th, December 10th, and December 20th.

[source,js]
--------------------------------------------------
{
  "trigger" : {
    "schedule" : {
      "yearly" : {
        "in" : [ "jan", "dec" ],
        "on" : [ 10, 20 ],
        "at" : [ "midnight", "noon" ]
      }
    }
  }
}
--------------------------------------------------
