lodestarYou may read that Mars has entered Taurus. In Western astrology, that change of sign is called an ingress.
An ingress happens at a sign boundary
Each zodiac sign covers 30 degrees. When Mars passes the end of Aries and reaches 0° Taurus, its position is now listed in Taurus. That entry into the new sign is the ingress.
Check the time behind the date
An ingress happens at a particular moment. The same moment can appear under different calendar dates in different time zones. If a post gives only a date, check which time zone it uses.
Your birth chart does not change
A birth chart records positions at the moment of birth. Mars entering a new sign today does not change the Mars sign in your birth chart. Astrologers may interpret a current ingress in different ways, but the entry alone does not promise a particular event.
A few common questions
Can an ingress tell me what will happen today?
No. It marks when a charted position enters another sign. That fact alone cannot tell you what will happen to a person.
Sources & further reading
Astrology sources describe their own traditions and methods; they do not establish predictive accuracy. The writing exercises are original Lodestar editorial material.