Glossary entry (derived from question below)
English term or phrase:
over the seasonal period
Russian translation:
в праздничный период
English term
Ukraine
Always high-quality and timely output
Native in: Russian 
, Ukrainian
Works in: Spanish to Russian, English to Russian, Spanish to Ukrainian, and 1 more.
over the seasonal period
• Orders placed at the weekend or after 6pm will be processed on the next working day.
• Orders over the seasonal period may take longer.
Thanks!
May 30, 2015 08:38: Olga Dyakova Created KOG entry
Proposed translations
в праздничный период
Experts estimate average weight gain over the seasonal period to be anywhere from one to four kilograms.
Russian Federation
There's No Limit to Perfection
Native in: Russian 
Works in: English to Russian, Russian to English, English
в сезон
France
French, English, Spanish...
Native in: Russian (Variant: Standard-Russia)
Works in: French to Russian, English to Russian, Spanish to Russian
Ukraine
To translate is to understand
Native in: Russian , Ukrainian
Works in: Ukrainian to Russian, German to Russian, English to Chinese, and 4 more.
«в течение данного сезонного периода» «в течение соответствующего сезонного периода»
Ответ может зависеть от контекста, например, если статья имеет научный характер, то вероятен смысл «соответствующий»
Russian Federation
Quality and reliability
Native in: Russian
Works in: English to Russian, Italian to Russian
скорее
еще встречается немного разговорный вариант "высокий сезон".
Например, перед Новым годом такое бывает
после окончания сезонного периода
France
Language is a beautiful thing...
Native in: Russian , Belarusian
Works in: French to Russian, English to Russian, Russian to French, and 8 more.
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