The Compendium of Caraka 5.12.69

5.12.69

vinā caturthīṃ navamīṃ vinā riktāṃ caturdaśīm/
madhyāhnamardharātraṃ ca bhūkampaṃ rāhudarśanam//

Excluding the fourth, ninth, and empty fourteenth [lunar days], / midday, midnight, an earthquake, and an eclipse of the sun or moon;