2016-01-19 UTC
# 
snarfed i'll confirm with FB's docs, but i compared to this FB publish with successful person tags, and it uses the same format: https://brid.gy/log?start_time=1447900406&key=aglzfmJyaWQtZ3lySwsSDVB1Ymxpc2hlZFBhZ2UiJGh0dHBzOi8vc25hcmZlZC5vcmcvMjAxNS0xMS0xOF9od2NfMgwLEgdQdWJsaXNoGICAgICAgIAKDA