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