PRIVACY · DATELINE

Private dates do not need to leave your device.

Birth dates, start and end dates, offsets, and results are calculated on the current page by default. DateLine does not upload them or build a personal calendar profile.

Device date and time zone

Age and relative dates use the device's current date, while display language and calendar formatting come from the browser. Dates are parsed at local noon to reduce UTC day shifts, but an incorrect device clock, time zone, or locale can still affect results. DateLine does not read external calendars, contacts, or location.

Business-day limits

Business-day counts and offsets exclude only Saturdays and Sundays. They do not include national, regional, religious, company, or personal holidays, half-days, substitute workdays, or labor rules. Use them for rough planning, not official payroll, compliance, or delivery calendars; verify material dates with the applicable authority.

Local workspace

Only when you explicitly choose Save or Import are current form fields stored as a local workspace in this browser; you can export it as JSON, restore it from a local JSON file, or clear it at any time. A workspace may contain birthdays, employment dates, or project dates, so consider sensitivity before sharing it or saving on a shared device. Undo history stays only in the current tab.

Display preferences and ads

The site uses .miluland.com domain cookies to sync language, theme, high-contrast preference, and up to 16 favorite tool IDs across MiluLand sites, with a local compatibility copy on the current site. Favorites contain only tool IDs—never inputs, files, or results—and can be cleared from the MiluLand tool directory or browser settings.

This page uses Google AdSense Auto Ads. Third parties may process cookies and ordinary network information under their policies; DateLine does not intentionally provide birthdays, schedules, results, or workspaces to the ad system.

Updated: September 5, 2026