  Vera C. Rubin Observatory, through the Legacy Survey of Space and Time
(LSST), will allow us to derive a panchromatic view of variability in young
stellar objects (YSOs) across all relevant timescales. Indeed, both short-term
variability (on timescales of hours to days) and long-term variability (months
to years), predominantly driven by the dynamics of accretion processes in
disk-hosting YSOs, can be explored by taking advantage of the multi-band
filters option available in Rubin LSST, in particular the $u,g,r,i$ filters
that enable us to discriminate between photospheric stellar properties and
accretion signatures. The homogeneity and depth of sky coverage that will be
achieved with LSST will provide us with a unique opportunity to characterize
the time evolution of disk accretion as a function of age and varying
environmental conditions (e.g. field crowdedness, massive neighbors,
metallicity), by targeting different star-forming regions. In this contribution
to the Rubin LSST Survey Strategy Focus Issue, we discuss how implementing a
dense observing cadence to explore short-term variability in YSOs represents a
key complementary effort to the Wide-Fast-Deep observing mode that will be used
to survey the sky over the full duration of the main survey ($\approx$10
years). The combination of these two modes will be vital to investigate the
connection between the inner disk dynamics and longer-term eruptive variability
behaviors, such as those observed on EXor objects.
