  Neutrino oscillations in matter provide a unique probe of new physics.
Leveraging the advent of neutrino appearance data from NOvA and T2K in recent
years, we investigate the presence of CP-violating neutrino non-standard
interactions in the oscillation data. We first show how to very simply
approximate the expected NSI parameters to resolve differences between two
long-baseline appearance experiments analytically. Then, by combining recent
NOvA and T2K data, we find a tantalizing hint of CP-violating NSI preferring a
new complex phase that is close to maximal: $\phi_{e\mu}$ or
$\phi_{e\tau}\approx3\pi/2$ with $|\epsilon_{e\mu}|$ or
$|\epsilon_{e\tau}|\sim0.2$. We then compare the results from long-baseline
data to constraints from IceCube and COHERENT.
