1. Without missing a week
   - weekly, every week, each week

See also: hebdomadal

• order Phasmida
• order Pholidota
• order Picariae
• order Piciformes
• order Piperales
• order Plantaginales
• order Platyctenea
• order Plecoptera
• order Plectognathi
• order Pleuronectiformes
• order Plumbaginales
• order Podicipediformes
• order Podicipitiformes
• order Polemoniales
• order Polygonales
• order Polymastigina
• order Polypodiales
• order Primates
• order Primulales
• order Proboscidea
• order Procellariiformes
• order Proteales
• order Protura
• order Pseudomonadales
• order Pseudoscorpiones