Mars leaves Leo and retrogrades back to Cancer on Jan. 6, a transit that celebrity astrologer Kyle Thomas tells PEOPLE can be "difficult" for many at this time

Today, Mars in retrograde enters the sign of Cancer, a powerful shift in the daily horoscope that calls for self-reflection and alignment with your true desires. This is a perfect time to check in with yourself and evaluate your motivations.

January will test your resilience, push you to confront your inner demons and face the darker aspects of your life you've been avoiding. Here's what your biggest challenge will be in the first month of 2025,