add handy time format & use DateOnly as default

README.md

@@ -17,14 +17,14 @@ The exporter expects either a YAML or JSON file with a single key, `deadlines`,
   * type: string
 * `deadline-time-format` - [golang time format string](https://golang.org/pkg/time/#Time.Format) (Example golang time format [constants](https://golang.org/pkg/time/#pkg-constants))
   * type: string
-  * default: RFC3339
+  * default: DateOnly
   * **Warning - exporter does not handle format strings without year, month, day, and tz info**
 * `threshold` - threshold quantity
   * type: int
-  * default: days
+  * default: 7
 * `threshold-type` - threshold type from one of: `years`, `months`, `days`, `hours`, `minutes`, `seconds`
   * type: string
-  * default: RFC3339
+  * default: days
 
 ### Exported Prometheus Metric Reference:
 * Name: `countdown_timers`

main.go

@@ -37,6 +37,11 @@ var timeFormatConstants = map[string]string{
 	"RFC1123Z":    "Mon, 02 Jan 2006 15:04:05 -0700", // RFC1123 with numeric zone
 	"RFC3339":     "2006-01-02T15:04:05Z07:00",
 	"RFC3339Nano": "2006-01-02T15:04:05.999999999Z07:00",
+	// Handy time format.
+	"Stamp":       "Jan _2 15:04:05",
+	"DateTime":    "2006-01-02 15:04:05",
+	"DateOnly":    "2006-01-02",
+	"TimeOnly":    "15:04:05",
 }
 
 var (
@@ -48,8 +53,8 @@ var (
 )
 
 var (
-	DefaultDeadlineTimeFormat = "RFC3339"
-	DefaultThreshold          = 60
+	DefaultDeadlineTimeFormat = "DateOnly"
+	DefaultThreshold          = 7
 	DefaultThresholdType      = "days"
 )