To answer the question, yes, it was take in 1917. It was the last day before their exile began:
Translation:
"During the day I bathed. The water was 18° C.
I threw Olga fully clothed into the lake from the gang plank. We said goodbye to people who are not coming with us. We showed Isa, Nastinka (Anastasia in other words), Trina (Catherine), papa's room. We have not slept all night and watched how the fusiliers loaded the baggage. We drank some tea with mama at midnight."
Next page:
"Kerensky came and said we must leave at 6:10 in the morning. Have left Tsarskoyé-Selo by train. As soon as the train got underway, went to bed and slept until lunch. Had lunch, drank some tea, and took the meal with mama in her compartment. Played at cards."
Hope I helped answer the question.