TDN.100:14 :ܙܒܢ̈ܐ ܕܝܢ ܕܒܗܘܢ ܙܕܩ ܕܬܫܒܚ܂ ܫܒܬܐ܂ ܚܕ ܒܫܒܐ܂ ܐܘ݁ ܦܣܟܐ ܐܘ ܕܢܚܐ܂ ܐܘ݁ ܦܢܛܝܩܘܣܛܐ‏ : the times, then, when it is proper to offer praise are: Saturday, Sunday, Easter, Epiphany, or Pentecost
See the entire entry for dnaḥ, denḥā n.m. rising, shining