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A one-off concert is one dated event; a weekly class is a recurring program that produces many dated occurrences. Model the series separately from each visitable date so that moving or canceling one Wednesday does not change every other Wednesday. For a bilingual guide, keep shared event facts under one internal identity and store each language’s page content separately. This is a practical design, not a schema required by any one standard.
How do one-off events differ from recurring events?
A one-off event happens once and needs a dated start and, where relevant, an end. A recurring event is a program with a rule that produces multiple occurrences; a particular date can be changed or canceled without changing the rest of the series. Google Calendar’s developer documentation states that “Single events are non-recurring and happen only once.” Google Calendar’s event concepts distinguish that case from recurring events.
The key is to separate identity from date. The series describes the continuing program—such as a weekly class—while an occurrence is the specific session someone can attend on a particular date. A single concert does not need a recurrence rule. A repeating class should not be represented as one event whose date is repeatedly overwritten, nor as an unbounded set of assumed future dates.
Schema.org allows repeated events to be represented as separate Event objects, while its Schedule vocabulary can describe a repeating pattern. Those are vocabulary options, not a mandate for your internal tables. Schema.org’s Event definition notes that repeated events may be structured as separate Event objects; Schedule describes properties for recurring dates and times.
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How should I store a weekly event and a one-off event?
Keep a stable identity for the event or program, and represent its dated occurrences independently. A one-off has a dated start and end; a recurring program has a local-time rule and timezone from which the guide can calculate a bounded set of dates. Treat the following as a practical model, not a standard-mandated schema.
| Record | What it represents | Typical information |
|---|---|---|
| Event or series | The program identity and facts that apply across dates | Stable internal ID, organizer, venue, source or provenance, shared description; for a series, its recurrence rule and named timezone |
| Occurrence | One specific dated instance of a series, or the single date of a one-off | Series ID, original scheduled local start, displayed start and end, current status |
| Occurrence override | A change that applies to one occurrence only | Cancellation, changed start or end, changed venue or status; keyed to the original scheduled instance |
| Translation | Language-specific page content associated with the shared event or series | Event ID and locale, translated title, description, slug and editorial notes |
A translation can use a compound identity such as (event_id, locale). If a particular occurrence needs a distinct description, let its translated override take precedence over the series-level translation. The same underlying event and occurrence IDs should connect the two language versions; translation does not create a second concert or class.
For an isolated event, save its dated start and end directly. Do not add a recurrence rule merely because the event might happen again someday. For a repeating program, store the organizer’s stated rule, its start, local wall-clock time, timezone and any supplied end condition. When an organizer has only confirmed a finite season, do not represent the program as guaranteed indefinitely.
What belongs in a recurrence rule?
A recurrence rule needs enough information to identify the intended pattern: when it starts, its local time, its frequency, constraints such as weekday, timezone, and an end condition where the organizer has supplied one. Schema.org’s Schedule vocabulary includes repeatFrequency, byDay, startTime, endTime, scheduleTimezone, active dates and exceptDate. A rule is not a guessed list of future dates: generate occurrences for the date range the guide needs to show.
For example, a hypothetical Wednesday class might use the illustrative iCalendar rule RRULE:FREQ=WEEKLY;BYDAY=WE. That example describes a pattern, not a verified class or a promise that the class runs forever. Add an appropriate count or end date if the organizer provides one. Google Calendar documents FREQ, BYDAY, COUNT, UNTIL, RDATE and EXDATE, and says not to combine COUNT and UNTIL in a single rule. See Google Calendar’s recurrence documentation.
How do the main modeling choices compare?
Choose a representation by asking what the reader can actually attend, not simply how many rows the database should contain. A one-off has one visitable date and no recurrence rule. A weekly program has a shared series identity plus many date-specific instances. A continuous multi-day event may be one event spanning a date range, while performances on separate dates—especially individually ticketed performances—are separate visitable events. The calendar’s display window also matters: a guide can generate the next several months of occurrences without claiming that the organizer has confirmed an endless run.
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There are two reasonable ways to represent dates: generate them from a recurrence rule, or explicitly list dates when the schedule is irregular or the organizer supplies a finite set. A rule is compact and captures a pattern; an explicit date list is unambiguous for a limited run but does not automatically express future weeks. A model may also combine a rule with additions such as RDATE and exclusions such as EXDATE, as iCalendar does. Do not turn a small number of confirmed dates into an unsupported weekly pattern simply to make entry easier.
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Compare the options across these dimensions: one occurrence versus many; a continuous span versus separate performances; facts shared by every date versus instance-level changes; a bounded recurrence rule versus listed dates; local time and daylight-saving behavior; translation completeness; and the destination—your guide calendar, an iCalendar feed, or Google’s event-search experience. The destination can change how much date-specific publishing is useful, but it does not change the underlying distinction between a series and an occurrence.
What happens when one date in a recurring series is canceled or moved?
Change the affected occurrence, not the series definition. A cancellation excludes that instance; a moved date is an override linked to the instance’s original scheduled time, even though its displayed start has changed.
This distinction prevents a moved occurrence from becoming impossible to identify. RFC 5545 uses RECURRENCE-ID to identify an instance by its original scheduled start, including when that instance is rescheduled. Its recurrence set is formed from DTSTART, RRULE and RDATE, then adjusted by EXDATE; exclusions take precedence and duplicates are ignored. Read the iCalendar specification for those recurrence semantics.
In a city-guide implementation, an occurrence override can hold a cancellation, new start or end, venue change, or status change. Keep the original scheduled time as its identity key and the revised time as the value shown to readers. Do not delete the series to cancel one week, and do not edit the series rule in a way that unintentionally removes unaffected dates.
To build a calendar or list for a requested window, expand the rule only across that window, merge applicable additions and overrides, remove exclusions, and sort by the resulting local start time. The user-facing list should show the current occurrence state—not an obsolete original time as if it were still bookable. A series-wide cancellation is different: it affects the program as a whole, whereas an instance cancellation affects one date.
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For dated Google Event markup, Google documents the statuses EventCancelled, EventPostponed and EventRescheduled; it also documents previousStartDate for a rescheduled event. Apply the relevant status and original-date information to the affected event page. A canceled date should not remain advertised as a bookable future occurrence. Consult Google’s Event structured-data guidance for the status properties.
How should the model handle local time and daylight saving changes?
Store the intended local wall-clock time and a named IANA timezone for a repeating schedule, then calculate the offset for each occurrence’s actual date. Do not bake one UTC offset into a rule that spans dates when local clocks may change. Schema.org provides scheduleTimezone, and Google Calendar’s recurrence guidance covers time zones; the design implication is that each generated date must retain the local time the organizer intended.
For a published dated Event, Google asks publishers to use the appropriate local offset in startDate where available. Keep all-day events as dates rather than inventing midnight timestamps: an all-day program is not necessarily an event that begins at midnight. These choices avoid displaying a repeating event at a different local hour after a clock change or implying a start time that was never given. The relevant guidance is in Schema.org Schedule, Google Calendar’s event concepts and Google’s Event documentation.
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Do I need separate event records for English and the second language?
No. Keep one internal event or occurrence identity and attach language-specific titles, descriptions, slugs and editorial notes to it. The translated page should be useful in its own language, but its language should not create a duplicate event or a different event time.
inLanguage can describe the language of an event’s content or performance; it does not translate the guide page. A performance in one language can have a page in another language, and a bilingual page may need to explain both. Use the field to describe what it actually describes rather than as a stand-in for page localization. See Schema.org’s inLanguage property.
Google recommends separate URLs for language versions rather than relying on cookies or browser settings alone. Each version should contain visible language-specific content and a language switch link that readers can access. Avoid automatic redirects that hide alternate versions. Reciprocal hreflang annotations should connect the corresponding pages, including a self-reference on each version; x-default is optional when a fallback page is appropriate. These are page-publishing practices, not a reason to duplicate event records. See Google’s guidance on localized versions.
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Should each occurrence have its own event page?
For the guide’s own calendar, a series overview plus date-specific occurrences is a useful structure. For Google’s event search experience, a series-level recurrence rule alone does not establish eligibility: Google expects a uniquely addressable single-event leaf page for an Event and calls for separate Event markup for performances with individual tickets.
Schema.org can express a Schedule through an Event’s eventSchedule. Its guidance says not to put startDate or endDate on that same scheduled Event because the Schedule defines them. Schema.org also offers EventSeries and subEvent/superEvent to express a genuine grouping. These vocabulary options describe structure; they do not guarantee a search display.
Google’s search feature has its own page-level requirements and distinguishes a continuous multi-day event from separate performances with individual tickets. A practical reconciliation is a series overview for readers plus dated occurrence pages and dated Event markup where warranted. Treat that as an implementation choice, not a promise that Google will include a page in an event feature. The detailed rules are in Schema.org Schedule, Schema.org Event and Google’s Event structured-data documentation.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Which model should I use for a city-guide calendar, feed or search page?
Choose based on what a reader needs to visit and what the publishing destination can represent. One-off events need a single dated record. Repeating programs need a rule plus independently identifiable occurrences. A continuous multi-day event and multiple separately ticketed performances are not interchangeable: the first may be one event spanning dates, while the second has distinct visitable dates.
- Guide calendar: Use a series overview when the ongoing program is useful context, and expand dates for the reader’s selected calendar window. Keep each exception attached to the date it changes.
- iCalendar feed: Preserve recurrence semantics and instance identity when exporting. An exception must remain tied to its original scheduled time so clients can reconcile it with the recurring set.
- Google event-search pages: Provide uniquely addressable dated event pages when the content and Google’s requirements support them. Do not assume that adding series markup alone will make recurring instances eligible.
- Bilingual pages: Keep the event identity shared while publishing language-specific URLs and content, then connect equivalent versions with the appropriate localization signals.
A useful publishing sequence is to confirm the organizer’s pattern and any end date, record the local time and timezone, generate only the dates needed for the guide’s window, and apply each cancellation or reschedule to its original instance. Then check the dated page and both language versions for consistent dates, venue, status and ticket information. If an occurrence has a translated detail that differs from the series description, use the occurrence-specific localized content rather than silently changing every date’s copy.
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1Scan for outdated or missing drivers - takes under a minute2Repair Windows errors before they cause bigger problems3Fix the driver behind crashes, sound loss and screen glitchesThere is no single database engine, CMS, paid service or table naming scheme prescribed by these standards. The design can be adapted to a guide’s existing platform; what matters is preserving the distinction among shared program facts, date-specific facts and localized text. Official Schema.org, Google and iCalendar materials describe vocabulary and recurrence behavior, but do not establish a performance advantage for one particular table layout. No directly relevant empirical statistic about bilingual event-model accuracy, performance or conversion is established by those materials.
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Check whether the date is an occurrence or a continuous span, whether the organizer has confirmed the recurring pattern and its end, whether an exception changes only one date, whether local-time behavior is defined, and whether both language pages accurately describe the same event. The central design decision is not “one row or many” in isolation: it is which facts belong to the program, which belong to a date, and which belong to a language version.
Frequently Asked Questions
Can the same event have different URLs in each language?
Yes. Google’s localized-version guidance favors distinct URLs for language variants and supports connecting equivalent pages with reciprocal hreflang annotations. Keep the event identity shared even though each URL serves a different language.
Can a multi-day festival be one event?
It can be modeled as one continuous multi-day event when it is one event spanning a date range. Separate performances with their own dates or individual tickets are distinct occurrences and may need separate dated event pages, especially for Google’s event-search requirements.
Does inLanguage mean the whole page is translated?
No. It describes the language of the event’s content or performance, not whether the guide page has been localized. A translated page still needs its own accurate title and description in that language.
What happens if a single Wednesday in a weekly series is canceled?
Exclude or mark that instance as canceled, keyed to its original scheduled local start. Keep the series rule and other Wednesdays intact, and ensure the canceled date is no longer presented as a bookable future occurrence.
Should I use COUNT and UNTIL together?
No. Google Calendar’s recurrence documentation says not to combine COUNT and UNTIL in one rule. Use the end condition supported by the organizer’s confirmed schedule.
Does Schema.org Schedule guarantee a Google event result?
No. Schema.org can describe a recurring schedule, but Google’s event-search requirements are a separate matter. Google expects a uniquely addressable single-event page; use dated Event pages and markup where the content and those requirements warrant them.
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No particular product or database is required by the cited guidance. The model is a practical way to keep series, occurrences, exceptions and translations distinct, and can be implemented in an existing system.
The Bottom Line
Give the program, each visitable date and each language version their own appropriate layer of identity. Generate only confirmed dates, tie exceptions to the original occurrence, preserve local time and timezone, and treat Schema.org vocabulary separately from Google event-search eligibility.

