Dpo peak day or last glow Green Day?

Kelee • 9•1•12 👫12•25•14💍4•23•17👰🏼8•12•18🤰🏼8•18•18👶🏼

Okay so do you ladies go by your last “Green Day” on glows calendar for your dpo or do you count from your peak day for dpo? First month ttc