  In this paper, the period evolution of the rotating chemically peculiar star
V473\,Tau is investigated. Even though the star has been observed for more than
fifty years, for the first time four consecutive years of space-based data
covering between 2007 and 2010 are presented. The data are from the {\sl
STEREO} satellite, and are combined with the archival results. The analysis
shows that the rotation period of V473\,Tau is $1.406829(10)$ days, and has
slightly decreased with the variation rate of 0.11(3)~s~yr$^{-1}$ over time.
Also, the acceleration timescale of the star is found to be shorter than its
main sequence lifetime. This indicates that the process of decrease in period
might be reversible. On this basis, it can be suggested that V473\,Tau has a
possible magnetic acceleration and a differential rotation, which cause a
variation in the movement of inertia, and hence the observed period change.
Additionally, the evolution path of V473\,Tau on the H-R diagram is evaluated.
Accordingly, the position of the star on the diagram suggests that its magnetic
properties develop before it reaches the main sequence or in the beginning of
its main sequence lifetime.
