elasticsearch-js/docs/reference/api/RollupDateHistogramGrouping.md

RollupDateHistogramGrouping [interface-RollupDateHistogramGrouping]

Name	Type	Description
calendar_interval	Duration	The interval of time buckets to be generated when rolling up.
delay	Duration	How long to wait before rolling up new documents. By default, the indexer attempts to roll up all data that is available. However, it is not uncommon for data to arrive out of order. The indexer is unable to deal with data that arrives after a time-span has been rolled up. You need to specify a delay that matches the longest period of time you expect out-of-order data to arrive.
field	Field	The date field that is to be rolled up.
fixed_interval	Duration	The interval of time buckets to be generated when rolling up.
format	string
interval	Duration
time_zone	TimeZone	Defines what time_zone the rollup documents are stored as. Unlike raw data, which can shift timezones on the fly, rolled documents have to be stored with a specific timezone. By default, rollup documents are stored in UTC.