Earth Day Calendar Add to Calendar Add to Timely Calendar Add to Google Add to Outlook Add to Apple Calendar Add to other calendar Export to XML When: April 20, 2019 @ 3:27 am 2019-04-20T03:27:00-07:00 2019-04-20T03:42:00-07:00 Join Marin County Parks for an event at Hal Brown Park. Check County Parks calendar for details.