# faketime > Fake the system time for a given command. > More information: . - Fake the time to this evening, before printing the result of `date`: `faketime '{{today 23:30}}' {{date}}` - Open a new `bash` shell, which uses yesterday as the current date: `faketime '{{yesterday}}' {{bash}}` - Simulate how a program would act next Friday night: `faketime '{{next Friday 1 am}}' {{path/to/program}}`