  We present a comprehensive analysis of the $\Lambda_{\rm s}$CDM model, which
explores the recent conjecture suggesting a rapid transition of the Universe
from anti-de Sitter vacua to de Sitter vacua (viz., the cosmological constant
switches sign from negative to positive) at redshift ${z_\dagger\sim 2}$,
inspired by the graduated dark energy (gDE) model. Our analysis shows that,
predicting $z_\dagger\approx1.7$, $\Lambda_{\rm s}$CDM simultaneously addresses
the major cosmological tensions of the standard $\Lambda$CDM model, viz., the
Hubble constant $H_0$, the Type Ia Supernovae absolute magnitude $M_{\rm B}$,
and the growth parameter $S_8$ tensions, along with other less significant
tensions such as the BAO Lyman-$\alpha$ discrepancy.
