3737064 - Why does the PO release date appear as the previous day (N‑1) in the PO notification email and its attached PO PDF?

Why does the PO release date appear as the previous day (N‑1) in the PO notification email and its attached PO PDF instead of the actual PO release date?

ariba network, purchase order date, po attachment, n-1 date, timezone, pst, email notification date, supplier portal, release date mismatch, date shift, timezone offset, cxml timestamp, integration gateway, custom mapping, erp po date , KBA , SBN-AN-TX-POA , Transaction (Purchase Orders, Ship Notices & Goods Receipts) , SBN-AN-SCC-FUL , Supply Chain Collaboration - Fulfillment , Problem