"Sunset" follows one basic pattern in five common work settings. Once you know the pattern, you can change the object to fit the setting.
Use sunset as a verb with a direct object, such as a product, feature, policy, program, or vendor relationship. Add a time phrase with "by," "on," "in," or "over." For a deadline, use by; "will not be sunset until June" is also natural. When useful, add the replacement or support plan. Both sunset and sunsetted are used as past-tense forms, so follow your organization's style.
Quick check: What ends, when, and what follows?
Use the article’s rule to judge this specific draft.
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Learn "Sunset" in depth →The five contexts where sunset shows up
The word has a similar use in five work settings. In product and tech, it can mean ending a feature, API, or tool; in strategy, it can mean closing a business line or old program. In vendor work, it can refer to ending a contract or support level. In policy and HR writing, use it for a policy or benefit, not for a person. In client writing, it can tell clients that a service or plan will end.
Internal roadmap note: "We'll sunset the v1 reporting API in favor of v2 once adoption crosses 90%."
Vendor/procurement memo: "Procurement has decided to sunset our contract with the legacy printing vendor by the end of the fiscal year."
Client email: "Your current support tier will be sunset on January 15; you'll be moved automatically to the equivalent plan at no change in price."
The grammar stays constant
The grammar stays the same in each setting: put the object right after the verb, then choose a time phrase that fits the date or period. You may use active or passive voice. Passive voice is common in formal notices, while active voice can show who is managing the change. The guides below explain each choice in more detail.
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Start the "Sunset" learning path →Choosing sunset over a nearby verb
Several nearby verbs may fit: deprecate, decommission, discontinue, "retire," or terminate. To choose, name the stage of the product or program, then match the formality of the message. The articles below compare these terms in depth.
The two gaps that undo an otherwise good sentence
A common mistake is adding a preposition before the object ("sunset on/from X"). In this use, sunset takes a direct object. Another common gap is leaving out clear facts, which may make a notice sound vague or evasive.
A clear sunset sentence has an object and a time; when useful, it also gives a replacement, a support period, or a next step.
Building the pattern into a habit
Use a short check before you send a message with "sunset" in it. Is the object a thing, not a person? Does it come right after the verb? Does the time phrase fit the date? Have you shared any needed fact about support, a replacement, or the next step?
With practice, these points become one simple task: state what is ending, when it will end, and what comes next. Also choose the appropriate level of formality. This article links those choices, while the other guides give more detail.
Practice scenarios
Practice using sunset in situations like:
- using sunset correctly across product, vendor, policy, and client-facing writing
- building a complete sunset sentence with an object, a timeframe, and a concrete detail
- explaining to a stakeholder why sunset is the right word instead of a nearby verb
Useful practice phrases:
- "We'll sunset the v1 reporting API in favor of v2."
- "Procurement has decided to sunset our contract with the legacy vendor."
- "Your current support tier will be sunset on January 15."
Draft the next sentence
One verb works across five settings with one main grammar pattern.
Name the object and the time. Add a useful fact when readers need it.
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