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The dates should be specified to match the dateFormat parameter. If not provided, the local default format will be tried. The CLI also tries (release 4.3 and higher) some standard default formats like: yyyy-MM-dd HH:mm:ss. 

Special Values

The date fields support some special values to make range selection easier: Table plusValueScaleDescriptionResolutiontodayday

• Use for startDate to retrieve all entries for the current day.

• Use for startDate and/or endDate.
• Use to indicate days back from today's date. 
• For instance, setting startDate to -1d will get all history for yesterday.

• Use for startDate and/or endDate.
• Use to indicate hours back from now. 
• For instance, setting startDate to -24h will get all history for the last 24 hours.

• Use for startDate and/or endDate.
• Use to indicate minutes back from now.
• For instance, setting startDate to -30m will get all history for the last 30 minutes.

• Use for startDate and/or endDate.
• Use to indicate seconds back from now.