From LibreChat-AI#16245 (LibreChat-AI#16245 (comment)).
ISO_DATE in packages/api/src/conversations/filters.ts accepts an hour-only offset (2026-09-01T12:00:00+02), but new Date() cannot parse it, so the request answers 400. The failure is closed and names the parameter; the first-party client sends toISOString() output. Normalize +HH to +HH:00 before constructing the date (and check +HHMM), with a spec case for each form.
From LibreChat-AI#16245 (LibreChat-AI#16245 (comment)).
ISO_DATEinpackages/api/src/conversations/filters.tsaccepts an hour-only offset (2026-09-01T12:00:00+02), butnew Date()cannot parse it, so the request answers 400. The failure is closed and names the parameter; the first-party client sendstoISOString()output. Normalize+HHto+HH:00before constructing the date (and check+HHMM), with a spec case for each form.