To count days from Jan 2020 to May 2023, we need to consider leap years and days in each year.

> ***January 2020 to December 2020:***
>> 2020 is a leap year, so it has ___366___ days.

> ***January 2021 to December 2021:***
>> 2021 is not a leap year, so it has ___365___ days.

> ***January 2022 to December 2022:***
>> 2022 is not a leap year, so it has ___365___ days.

> ***January 2023 to May 2023:***
>> January has 31 days
>> February has 28 days
>> March has 31 days
>> April has 30 days
>> May has 31 days
>> Total: ___151___ days

Now, we add the days from all years and months:
366 (2020) + 365 (2021) + 365 (2022) + 151 (Jan-May 2023) = 1247 days

Hence, there are 1247 days between January 2020 and the end of May 2023.
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