noun
evening rush hour
Refers to the peak commuting period when people return home from work or school, typically in the late afternoon to early evening.
帰宅ラッシュの時間帯は電車がとても混みます。
Trains get very crowded during the evening rush hour.
通勤ラッシュ refers to the morning rush hour when people commute to work, while 帰宅ラッシュ is the evening rush hour when they return home.
Compound of 帰宅 (きたく, 'returning home') and ラッシュ ('rush', from English 'rush hour').