Three day notices are served on a tenant for not paying rent, or violating a term of the lease. For example, if the tenant has not paid rent then the “3-day” notice demands that the tenant pay the rent or move out within three days. If the tenant has violated the lease, such has having an unauthorized occupant, then the notice demands that they correct the violation or move out within three days.
In the past the days that the tenant has to perform has included weekends and holidays. Effective September 1, 2019, AB 2343 changes the existing law to exclude weekends and holidays, adding additional time for the tenant to pay the rent or correct the violation.
Knowledge of this change is important should it become necessary to serve a 3 day notice to your tenant. If you were to proceed to eviction without complying with the new law then you would likely lose your case. The courts are typically not forgiving of errors made by landlords.