Chrono Mock

The public page describes fixed, frozen, and accelerated clocks, a per-process time-zone offset, and child-process handling. Installation and actual time substitution remain Not reviewed, including whether the system clock stays isolated in each supported case.

It runs on Windows. You point it at an executable, set a date such as the last second of 2027 or a relative shift like +30 days, and choose whether that clock flows normally, stays frozen or runs faster by a whole-number multiplier, so x1440 turns a day into a minute. A session can also jump forward or backward partway through, which mimics a laptop resyncing with a time server.

This may fit developers testing date-dependent behavior in software they own. A command-line interface and date calculator are described for repeatable scenarios. Child-process and Electron handling remain Not reviewed, and a locally substituted clock need not replace time fetched from a network service.

The coverage report is the interesting part. The site shows covered time channels and warnings for sources the tool cannot replace. Calling out gaps could help interpret a test result, though the accuracy of those reports remains Not reviewed.

Chrono Mock is free and open source under GPL-3.0. It comes as a portable zip or a signed .msi installer, and running it doesn't need administrator rights. The same engine sits behind a desktop window and a command line meant for CI, with commands such as chrono run with --at or --mode x1440 and named presets that write a session report to a file. A separate date calculator suggests boundary dates worth testing, such as the 2038 limit for 32-bit Unix time, and prints each result in formats from ISO dates to Windows FILETIME.

The site counts 45 time channels, 31 that it shifts and 14 that it only counts, and compares that with the five wall-clock functions RunAsDate intercepts. Its comparison page also says where RunAsDate is still the better pick. Electron and Chromium apps go through a different mechanism, because their clock lives in a sandboxed renderer. The footer says the tool needs no account, sends no telemetry and never connects to the internet, and the site is available in 22 languages.