Update 4: 2021-10-16 16:33 UTC: Today's window is done. Actual user-visible downtime was negligible. Thanks for bearing with us! This round of maintenance is done.
Update 3: 2021-10-16 15:00 UTC: Today's window is starting.
Update 2: 2021-10-15 15:46 UTC: SEDE is back. Actual downtime was about 30 minutes. We're done. Thank you for your patience.
Update: 2021-10-15 15:11 UTC: This is starting now.
Due to ongoing planned network upgrades, data.stackexchange.com (a.k.a. SEDE or the Stack Exchange Data Explorer) may be unavailable for up to 2 hours on Friday and Saturday this week. Likely considerably less.
We appreciate your patience.