# Argon- System Mode Manual- Infrequent publishes **URL:** \ **Category:** Firmware\ **Tags:** argon\ **Created:** [August 20, 2020, 7:59pm UTC](https://community.particle.io/t/argon-system-mode-manual-infrequent-publishes/57470 "2020-08-20T19:59:10Z")\ **Posts on this page:** 1\ **Showing post:** 14
**Author:** ![robc](https://avatars.discourse-cdn.com/v4/letter/r/e9a140/32.png) [@robc](https://community.particle.io/u/robc)\ **Post date:** [August 25, 2020, 1:34pm UTC](https://community.particle.io/t/argon-system-mode-manual-infrequent-publishes/57470/14 "2020-08-25T13:34:23Z")
> [@sunder](#): > > I am still a bit confused what happens when millis() overflows and goes to 0. In addition, check this tutorial out: > [@Millis() and rollover tutorial](https://community.particle.io/t/millis-and-rollover-tutorial/20429): > > The millis() function is handy for timing things with the Particle Photon (and Electron, and Core). It executes very quickly and has a good resolution (milliseconds). From the manual: Returns the number of milliseconds since the device began running the current program. This number will overflow (go back to zero), after approximately 49 days. Note: The return value for millis is an unsigned long, errors may be generated if a programmer tries to do math with other datatypes such as ints. Now… --- _[View the full topic](https://community.particle.io/t/argon-system-mode-manual-infrequent-publishes/57470)._