docs: Add calendar-day deduplication trigger options for Destinations and Workflows

[inkeep]

Summary

This PR documents the new calendar-day deduplication trigger options added in PostHog/posthog#55433.

Changes

Destinations (contents/docs/cdp/destinations/index.md)

Added a new Trigger options section documenting all deduplication options:

• Run every time – no deduplication
• Run once per interval – global rolling window
• Run once per person per interval – per-person rolling window
• Run once per person per event name per interval – per-person per-event rolling window
• Once per person per day (UTC) – 🆕 new calendar-day per-person deduplication
• Once per person per event per day (UTC) – 🆕 new calendar-day per-person per-event deduplication

Workflows (contents/docs/workflows/workflow-builder.mdx)

Added a new Trigger frequency subsection documenting:

• Every time – fires on every event
• One time – once per person
• Once per calendar day – 🆕 new calendar-day deduplication

Why calendar day options?

The new calendar-day options solve the issue where 24-hour rolling intervals suppress events across day boundaries. For example, with a rolling 24-hour interval, an event at 3pm Monday would block an event at 10am Tuesday. With calendar day options, events reset at midnight UTC each day.

The docs note that calendar-day options use UTC timezone.

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This PR was created by the Inkeep Content Writer agent, which is maintained by the Docs and Wizard team. Please reach out on Slack for help if needed.

[github-actions]

Deploy preview

Status	Details	Updated (UTC)
🟢 Ready	View preview	Apr 21, 2026 02:01PM

[github-actions]

Vale prose linter → found 10 errors, 14 warnings, 0 suggestions in your markdown

Full report → Copy the linter results into an LLM to batch-fix issues.

Linter being weird? Update the rules!

contents/docs/cdp/destinations/index.md — 3 errors, 4 warnings, 0 suggestions

Line	Severity	Message	Rule
11:14	warning	'automations' is a possible misspelling.	PostHogBase.Spelling
19:32	error	Use straight quotes and apostrophes, not curly ones.	PostHogDocs.CurlyQuotes
23:16	warning	'firehose' is a possible misspelling.	PostHogBase.Spelling
54:64	warning	Capitalize 'Logs' for PostHog's product. Use 'logs' for the general industry concept.	PostHogBase.ProductNames
56:15	warning	Capitalize 'Logs' for PostHog's product. Use 'logs' for the general industry concept.	PostHogBase.ProductNames
60:41	error	Use straight quotes and apostrophes, not curly ones.	PostHogDocs.CurlyQuotes
60:158	error	Use straight quotes and apostrophes, not curly ones.	PostHogDocs.CurlyQuotes

contents/docs/workflows/workflow-builder.mdx — 7 errors, 10 warnings, 0 suggestions

Line	Severity	Message	Rule
27:22	warning	Capitalize 'Workflows' for PostHog's product. Use 'workflows' for the general industry concept.	PostHogBase.ProductNames
36:173	warning	Capitalize 'Workflows' for PostHog's product. Use 'workflows' for the general industry concept.	PostHogBase.ProductNames
40:7	warning	Capitalize 'Workflows' for PostHog's product. Use 'workflows' for the general industry concept.	PostHogBase.ProductNames
82:109	warning	'automations' is a possible misspelling.	PostHogBase.Spelling
114:24	error	Hi, Andy here... use an en dash ( – ) with spaces. On Mac, holding down the Option and hyphen key will give you an en dash.	PostHogBase.EnDash
114:90	warning	Capitalize 'Feature Flags' for PostHog's product. Use 'feature flags' for the general industry concept.	PostHogBase.ProductNames
115:28	error	Hi, Andy here... use an en dash ( – ) with spaces. On Mac, holding down the Option and hyphen key will give you an en dash.	PostHogBase.EnDash
175:91	warning	Capitalize 'Workflows' for PostHog's product. Use 'workflows' for the general industry concept.	PostHogBase.ProductNames
179:89	warning	Capitalize 'Workflows' for PostHog's product. Use 'workflows' for the general industry concept.	PostHogBase.ProductNames
180:117	warning	Capitalize 'Workflows' for PostHog's product. Use 'workflows' for the general industry concept.	PostHogBase.ProductNames
193:105	warning	Capitalize 'Workflows' for PostHog's product. Use 'workflows' for the general industry concept.	PostHogBase.ProductNames
195:1	error	Hi, Andy here... use an en dash ( – ) with spaces. On Mac, holding down the Option and hyphen key will give you an en dash.	PostHogBase.EnDash
196:1	error	Hi, Andy here... use an en dash ( – ) with spaces. On Mac, holding down the Option and hyphen key will give you an en dash.	PostHogBase.EnDash
197:1	error	Hi, Andy here... use an en dash ( – ) with spaces. On Mac, holding down the Option and hyphen key will give you an en dash.	PostHogBase.EnDash
198:1	error	Hi, Andy here... use an en dash ( – ) with spaces. On Mac, holding down the Option and hyphen key will give you an en dash.	PostHogBase.EnDash
202:48	warning	Capitalize 'Workflows' for PostHog's product. Use 'workflows' for the general industry concept.	PostHogBase.ProductNames
206:90	error	Hi, Andy here... use an en dash ( – ) with spaces. On Mac, holding down the Option and hyphen key will give you an en dash.	PostHogBase.EnDash

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