semkuSobriety Calculator
Count calendar days from your chosen start date and view 30-day, 60-day, 90-day, and one-year dates.
Calendar days elapsed
279
Years: 0 · Months: 9 · Days: 6
| Milestone | Date | Days remaining |
|---|---|---|
| 30 days | January 31, 2026 | Reached |
| 60 days | March 2, 2026 | Reached |
| 90 days | April 1, 2026 | Reached |
| 1 year | January 1, 2027 | 86 days remaining |
Next milestone: 1 year — January 1, 2027
Calendar milestone estimates based on your dates. They do not assess health, recovery progress, or treatment outcomes.
Sources and definitions
U.S. Naval Observatory — Calendars
Gregorian calendar and leap-year rule (divisible by 4, except century years not divisible by 400). Day 0, end-of-month dates and the milestone list are this calculator’s own calendar rules.
Calculation rules
Calendar days elapsed = as-of date − start date. The start date is day 0.
The 30-day, 60-day and 90-day dates add that many calendar days to the start date. The 1-year date is the same month and day in the following year; February 29 becomes February 28 in a non-leap year.
Years, months and days: whole years are added to the start date first, then whole months, then the remaining days. A day that does not exist in the target month becomes the last day of that month.
The as-of date starts as this device’s local date. Only calendar dates are used, so time zones and daylight saving time do not change the count.
Frequently asked questions
- Is the start date day zero?
- Yes. The following calendar date is day one.
- What happens with a February 29 start?
- The one-year date is February 28 in the following non-leap year.
- Does daylight saving time change the count?
- No. The calculator counts calendar dates, not blocks of 24 hours.
- Do the milestones measure recovery?
- No. They are calendar dates based on your chosen start date, not assessments of health or recovery.
Privacy on this page
Calculations run in your browser. The dates you enter are not sent to the server or saved in browser storage. Reloading the page returns the inputs to their initial state.
To understand how the page is used and to improve the service, this page sends semku’s own usage statistics and automatic error reports. They go only to the dedicated endpoint under semku.com/api/telemetry/v1/. They are not used for advertising or third-party tracking.
Fixed identifiers distinguish pages and features. Calculations run in your browser without sending your calculation inputs or results to the server. Inputs are not sent as hashes or as size categories either. The full URL and search terms are not sent.
Operations and sessions are distinguished by randomly generated identifiers. In the browser, these identifiers exist only in temporary memory and are not written to cookies or browser storage. No identification based on cookies or combined device characteristics is used.
Error reports contain the error type, code and time, and, where available, a registered program-source identifier with line and column numbers. The error message text and stack traces are not sent. Usage statistics and error reports also carry the site identifier, the deployment version and a random record identifier. For access records such as IP addresses, browser signals (User-Agent Client Hints), region and language, see the paragraph below.
The feedback form sends the rating you chose and the text you typed in the free-text field when you press the send button. The form also sends a random ID that distinguishes the submission, along with the page, site, deployment version and type of request. There are no fields for your name, email address or phone number, and the dates you enter are not attached automatically. Before sending your text, the widget removes leading and trailing whitespace and, if you selected a rating, adds [+1] or [-1] at the start; it makes no other changes to your text. After receipt, the collector standardizes line endings and removes leading and trailing whitespace. Please do not enter personal data, passwords, authentication keys or payment details.
To improve the service, we record the country and state/province-level region at the time of your visit (an estimate based on the connecting network), which site you came from including the page path, and one display-language setting announced by your browser (for example, en-US). Location is kept to country and region only; no city or precise position is recorded. When you use the service, connection records, including your IP address, are automatically generated and retained to maintain service security and identify abnormal access. Cloudflare is the data processor for this site. Collection of this item is enabled only after this notice is published; we do not collect it retrospectively for use before collection is enabled. Query strings such as search terms are not recorded, and neither is the full list of preferred languages or the raw request headers. Collection of this information is currently disabled and will only be enabled after this notice is published. If we enable collection, we will collect and use signals your browser reports about its type and version, along with an indication of whether automation tools are being used, to identify bots. These browser signals are estimates and do not conclusively identify your browser's type or version or whether automation tools are being used. We do not collect it retrospectively for use before collection is enabled. The raw User-Agent request header is not recorded. These records are per visit only and use no identifier that links one visit to another. Recording starts only with visits after this notice is published and is not applied retroactively to earlier visits. The region and the referring site have been recorded since 2026-09-20; the display language since 2026-09-24. Browser signals are not recorded yet.
Separately, when you visit the site, the hosting provider records your IP address, the time of the request and user-agent information about your browser and device in Cloudflare Pages’ standard access logs.
For details, see the privacy policy.
Calculations run in your browser without sending your calculation inputs or results to the server. See “Privacy on this page” for information about access data.