countdown

Duration

• P7D is 7 days.
• P1W is 1 week.
• P1M is 1 month.
• PT10M is 10 minutes.
• P1DT12H is 1 day plus 12 hours.
• P1Y2M3D is 1 year, 2 months, and 3 days.
• PT4H5M6S is 4 hours, 5 minutes, and 6 seconds.

Timestamp

• yyyy-mm-ddThh:mm:ss[Z/±00:00]
• 1970-00-00T00:00:00Z
• 2000-12-31T12:34:56-00:00