How many days in... 2018 has 365 days. January (Jan) 2018 There are 31 days in this month. February (Feb) 2018 There are 28 days in this month. March (Mar) 2018 There are 31 days in this month. April (Apr) 2018 There are 30 days in this month. May (May) 2018 There are 31 days in this month. June (Jun) 2018 There are 30 days in this month. July (Jul) 2018 There are 31 days in this month. August (Aug) 2018 There are 31 days in this month. September (Sep) 2018 There are 30 days in this month.