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Filter search results by publication date to find recent breakthroughs or analyse historical trends.

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Parameters

Both are optional and work independently or together. Dates use ISO 8601 format: YYYY-MM-DD.
ParameterEffectExample
start_dateInclude content published on or after this date"2024-01-01"
end_dateInclude content published on or before this date"2024-12-31"
Dates must match YYYY-MM-DD exactly. "3/15/2024", "March 15, 2024", and "15-03-2024" are all invalid.

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Examples

from valyu import Valyu

valyu = Valyu()

# Recent content - June 2024 onwards
valyu.search("quantum computing breakthroughs", start_date="2024-06-01")

# Date range - all of 2023
valyu.search(
    "artificial intelligence ethics",
    start_date="2023-01-01",
    end_date="2023-12-31",
)

# Historical - pre-deep-learning era
valyu.search("machine learning foundations", end_date="2015-12-31")
More specific date ranges typically improve response times and relevance.
Content typeRecommended rangeWhy
Academic papers6-12 monthsLonger publication cycles
NewsDays to weeksFast-moving information
Technical docs1-3 monthsRegular updates
Financial reportsQuarters or yearsReporting cycles

Source filtering

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Search quickstart

All search parameters