According to the search results, there are different answers to the question "what moon phase is it today?" depending on the source. Here are the different answers:

• Moongiant.com: The Moons current phase for October 31, 2023, is a Waning Gibbous.
• The Old Farmers Almanac: The Moon phase for tonight (October 31, 2023) is a Waxing Crescent.
• The Nine Planets: The current moon phase for Thursday, September 21, 2023, is a Waning Crescent.
• Lunaf.com: Todays Moon phase is Waning Gibbous.
• Time and Date: The Moon phase for October 31, 2023, is not provided, but the website provides a lunar calendar with precise times and simulation of the Moon phase for any day of the year.
• Space.com: The Moon phase for October 30, 2023, is a Waning Gibbous.

Therefore, the answer to the question "what moon phase is it today?" depends on the source consulted and the date in question.