Date & Time Errors

All date formats failed to parse

Matches: All formats failed to parse

WHAT THIS ERROR MEANS

The lubridate parsing function couldn't match your date string to any expected format. The date string format doesn't match the function you used (e.g., using mdy() on a day-month-year string).

HOW TO FIX IT

1. Match the function to your date format: ymd(), mdy(), dmy().

2. Check for unexpected characters in date strings.

3. Use parse_date_time() with explicit format orders for complex formats.

CODE EXAMPLES

BAD — THIS CAUSES THE ERROR

library(lubridate)
ymd("03/15/2024")  # this is mdy format

GOOD — CORRECT APPROACH

library(lubridate)
mdy("03/15/2024")  # correct function for month/day/year

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