Day and night,
handled by the sun.

Fixed hours with overnight ranges, or offline sunrise/sunset math for your coordinates with minute offsets.

Point it at installed light and dark .theme files — any two images, or a slideshow folder per theme — and the wallpaper changes along, silently, no flashing windows.

Separate light and dark lock images that switch with the theme — or leave them empty and the desktop wallpaper is reused. No admin rights needed.

One accent color for day, another for night — picked from swatches in a click and applied with every switch.

Detect fills your coordinates from IP once — every sunrise after that is computed offline, on your machine.

Dark apps with a light taskbar? Light apps after dark? Mix however you like.

One click checks GitHub Releases, verifies the SHA256 checksum, swaps the exe and restarts. Settings survive.

Headless --toggle, --light, --dark and --status flags for hotkeys, schedulers and scripts.

Full English and Russian interface with one-click switching — every label, error, tray hint and sunrise caption.

Hit Switch in the middle of the day and the manual theme holds until the next scheduled change — no more snap-back within seconds.

Sun icon by day, moon by night — the tray itself tells you which theme is on, with a live tooltip for what's next.

Theme-aware tray icon with a live status tooltip, autostart, single instance. About 11 MB on disk, ~0% CPU idle.

Everything lives in a local config file. The network is touched only when you press a button.