concept

CH column metadata: esios.archives_i90_qh.datetime_qh

Quarter-hour timestamp (tz-aware Europe/Madrid). Equals `datetime` for native QH rows; for fanned-out hourly rows it is `datetime + 15min·qh_offset`. Use this, not `datetime`, as the QH axis.

# `esios.archives_i90_qh.datetime_qh` Quarter-hour timestamp (tz-aware Europe/Madrid). Equals `datetime` for native QH rows; for fanned-out hourly rows it is `datetime + 15min·qh_offset`. Use this, not `datetime`, as the QH axis. - **category**: dimension