Previous value: -"Template id from create_recurring_calendar_event."New value: +"Template id from list_recurring_calendar_events or create_recurring_calendar_event."

Previous value: -"True for all-day instances, false for timed."New value: +"True for all-day instances, false for timed. An all-day instance starts at midnight of its occurrence date in the template timezone (stored in UTC; omit startTime) and ends duration later (no end without a duration), so a duration of one day or more makes each instance span that many whole days."

Added value: +{
+  "description": "New reminder lead times, in minutes before each occurrence starts. Send the full list: it replaces the current one. [] clears all reminders; omit to keep them. A change also applies to existing instances. Each value is whole hours, 60-1380 (1-23 hours), or whole days, a multiple of 1440 up to 40320 (4 weeks, the most for a repeating item); a week is 10080. Up to 5 values. An all-day event counts from 00:00 on its first day, so 300 (5 hours) is 19:00 the evening before. Day and week reminders arrive at 19:00 on the earlier day; hour reminders arrive that many hours before the start, or up to 15 minutes earlier. Every household member is reminded.",
+  "examples": [
+    [
+      1440,
+      10080
+    ]
+  ],
+  "items": {
+    "description": "One lead time in minutes: whole hours 60-1380, or a multiple of 1440 for days.",
+    "examples": [
+      1440
+    ],
+    "maximum": 40320,
+    "minimum": 60,
+    "multipleOf": 60,
+    "type": "integer"
+  },
+  "maxItems": 5,
+  "type": "array",
+  "uniqueItems": true
+}

Previous value: -"New recurrence interval, NOT a cron expression despite the field name. Format is 'N Unit' where N is a positive integer and Unit is one of Day, Week, Month, Year (case-sensitive), e.g. '1 Day', '2 Week', '1 Month', '1 Year'. Omit to leave unchanged. Changing this deletes and regenerates future instances."New value: +"New interval as 'N Unit', Unit one of Day, Week, Month, Year, e.g. '2 Week'. Not cron syntax."

Previous value: -"New longer free-text description. Omit to leave unchanged. Patching this alone updates existing generated instances in place rather than regenerating them. Up to 2000 characters."New value: +"New description, patched onto existing instances."

Added value: +[
+  "Sync on sprint progress"
+]

Previous value: -"New length of each instance, in ISO 8601 duration format. Omit to leave unchanged. Changing this deletes and regenerates future instances."New value: +"Length of each instance, ISO 8601 duration e.g. 'PT30M'."

Previous value: -"PATCH-style date field: omit or send null to leave the stored end date unchanged, send an empty string to clear it (recurrence becomes unbounded by date), or send 'YYYY-MM-DD' to set a new last occurrence date. Changing this deletes and regenerates future instances."New value: +"New last date, YYYY-MM-DD. Empty string leaves it unbounded."

Previous value: -"Id of the recurring calendar event (template) to update."New value: +"Template id from create_recurring_calendar_event."

Previous value: -"True if generated instances are all-day events; false for timed instances. Omit to leave unchanged. Changing this deletes and regenerates future instances."New value: +"True for all-day instances, false for timed."

Added value: +[
+  false
+]

Previous value: -"New location, replacing the existing one entirely. Omit to leave unchanged. Patching this alone updates existing generated instances in place rather than regenerating them. Set $type to 'Address' for physical (with line1-3, postalCode, countryCode) or 'OnlineLocation' for virtual (with url, notes)."New value: +"Replaces the location outright. $type 'Address' takes line1-3/postalCode/countryCode; 'OnlineLocation' takes url/notes."

Previous value: -"Location type discriminator"New value: +"Which location shape this is."

Added value: +[
+  "Address"
+]

Previous value: -"Country code for the address (Address type)."New value: +"ISO country code, e.g. GB."

Previous value: -"First line of the street address (Address type). At least one of line1-3/postalCode is required when $type is 'Address'."New value: +"Address line 1. An Address needs one of line1-3 or postalCode."

Previous value: -"Second line of the street address (Address type), e.g. building or suite."New value: +"Address line 2, e.g. flat or suite."

Added value: +[
+  "Flat 3"
+]

Previous value: -"Third line of the street address (Address type)."New value: +"Address line 3."

Added value: +[
+  "London"
+]

Previous value: -"Notes about the location, e.g. parking instructions or a meeting passcode. Up to 500 characters for OnlineLocation."New value: +"Access detail, e.g. parking or passcode."

Added value: +[
+  "Bring your laptop"
+]

Previous value: -"Postal or ZIP code (Address type). Up to 20 characters."New value: +"Postal or ZIP code."

Previous value: -"URL for online locations (OnlineLocation type). Must be an absolute http/https URL."New value: +"Absolute http/https join link."

Added value: +[
+  "https://meet.google.com/abc-defg-hij"
+]

Previous value: -"New maximum number of instances to generate. Omit to leave unchanged. Changing this deletes and regenerates future instances."New value: +"New cap on instances generated."

Previous value: -"New freeform notes. Omit to leave unchanged. Patching this alone updates existing generated instances in place rather than regenerating them. Up to 5000 characters."New value: +"New notes."

Added value: +[
+  "Bring your laptop"
+]

Previous value: -"PATCH-style date field: omit or send null to leave the stored start date unchanged, send an empty string to clear it, or send 'YYYY-MM-DD' to set a new anchor date. Changing this deletes and regenerates future instances."New value: +"New first-instance date, YYYY-MM-DD. Empty string clears it."

Previous value: -"New time of day each instance starts, in HH:mm:ss format (local to timezone). Omit to leave unchanged. Changing this deletes and regenerates future instances."New value: +"New local start time, HH:mm:ss."

Previous value: -"IANA timezone id (e.g. 'Europe/London') that startTime is in. Omit to leave unchanged; null resets to UTC. Changing this regenerates instances."New value: +"IANA zone for startTime, e.g. 'Europe/London'. Occurrences follow its DST."

Previous value: -"New event title/summary. Omit to leave unchanged. Patching this alone updates existing generated instances in place rather than regenerating them. Up to 200 characters."New value: +"New title, patched onto existing instances."

Added value: +[
+  "Weekly team standup"
+]

Added value: +[
+  {
+    "cronExpression": "2 Week",
+    "endDate": "2027-01-31",
+    "id": "0198f3a1b2c34d5e6f7089ab1c2d3e4f"
+  }
+]

Previous value: -"Cron expression for recurrence"New value: +"New recurrence interval, NOT a cron expression despite the field name. Format is 'N Unit' where N is a positive integer and Unit is one of Day, Week, Month, Year (case-sensitive), e.g. '1 Day', '2 Week', '1 Month', '1 Year'. Omit to leave unchanged. Changing this deletes and regenerates future instances."

Added value: +[
+  "2 Week"
+]

Added value: +"New longer free-text description. Omit to leave unchanged. Patching this alone updates existing generated instances in place rather than regenerating them. Up to 2000 characters."

Previous value: -"Duration in ISO 8601 format, e.g. PT1H30M"New value: +"New length of each instance, in ISO 8601 duration format. Omit to leave unchanged. Changing this deletes and regenerates future instances."

Added value: +[
+  "PT30M"
+]

Previous value: -"YYYY-MM-DD format"New value: +"PATCH-style date field: omit or send null to leave the stored end date unchanged, send an empty string to clear it (recurrence becomes unbounded by date), or send 'YYYY-MM-DD' to set a new last occurrence date. Changing this deletes and regenerates future instances."

Added value: +[
+  "2027-01-31"
+]

Added value: +"Id of the recurring calendar event (template) to update."

Added value: +[
+  "0198f3a1b2c34d5e6f7089ab1c2d3e4f"
+]

Added value: +"True if generated instances are all-day events; false for timed instances. Omit to leave unchanged. Changing this deletes and regenerates future instances."

Previous value: -"Location. Set $type to 'Address' for physical (with line1-3, postalCode, countryCode) or 'OnlineLocation' for virtual (with url, notes)."New value: +"New location, replacing the existing one entirely. Omit to leave unchanged. Patching this alone updates existing generated instances in place rather than regenerating them. Set $type to 'Address' for physical (with line1-3, postalCode, countryCode) or 'OnlineLocation' for virtual (with url, notes)."

Added value: +"Country code for the address (Address type)."

Added value: +[
+  "GB"
+]

Added value: +"First line of the street address (Address type). At least one of line1-3/postalCode is required when $type is 'Address'."

Added value: +[
+  "221B Baker Street"
+]

Added value: +"Second line of the street address (Address type), e.g. building or suite."

Added value: +"Third line of the street address (Address type)."

Added value: +"Notes about the location, e.g. parking instructions or a meeting passcode. Up to 500 characters for OnlineLocation."

Added value: +"Postal or ZIP code (Address type). Up to 20 characters."

Added value: +[
+  "NW1 6XE"
+]

Previous value: -"URL for online locations"New value: +"URL for online locations (OnlineLocation type). Must be an absolute http/https URL."

Added value: +"New maximum number of instances to generate. Omit to leave unchanged. Changing this deletes and regenerates future instances."

Added value: +[
+  20
+]

Added value: +"New freeform notes. Omit to leave unchanged. Patching this alone updates existing generated instances in place rather than regenerating them. Up to 5000 characters."

Previous value: -"YYYY-MM-DD format"New value: +"PATCH-style date field: omit or send null to leave the stored start date unchanged, send an empty string to clear it, or send 'YYYY-MM-DD' to set a new anchor date. Changing this deletes and regenerates future instances."

Added value: +[
+  "2026-08-03"
+]

Previous value: -"Time of day in HH:mm:ss format"New value: +"New time of day each instance starts, in HH:mm:ss format (local to timezone). Omit to leave unchanged. Changing this deletes and regenerates future instances."

Added value: +[
+  "09:00:00"
+]

Previous value: -"IANA timezone id (e.g. 'Europe/London') that startTime is in. Changing this regenerates instances."New value: +"IANA timezone id (e.g. 'Europe/London') that startTime is in. Omit to leave unchanged; null resets to UTC. Changing this regenerates instances."

Added value: +[
+  "Europe/London"
+]

Added value: +"New event title/summary. Omit to leave unchanged. Patching this alone updates existing generated instances in place rather than regenerating them. Up to 200 characters."