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README.md

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 # humantime_to_duration
-Parses a relative time string and returns a `Duration` 
+
+A Rust crate for parsing human-readable relative time strings and converting them to a `Duration`.
+
+## Features
+
+- Parses a variety of human-readable time formats.
+- Supports positive and negative durations.
+- Allows for chaining time units (e.g., "1 hour 2 minutes" or "2 days and 2 hours").
+
+## Usage
+
+Add this to your `Cargo.toml`:
+
+```toml
+[dependencies]
+humantime_to_duration = "0.1.0"
+```
+
+Then, import the crate and use the from_str function:
+```
+use humantime_to_duration::from_str;
+use time::Duration;
+
+let duration = from_str("+3 days");
+assert_eq!(duration, Some(Duration::days(3)));
+```
+
+### Supported Formats
+
+The `from_str` function supports the following formats for relative time:
+
+- `num` `unit` (e.g., "-1 hour", "+3 days")
+- `unit` (e.g., "hour", "day")
+- "now" or "today"
+- "yesterday"
+- "tomorrow"
+- use "ago" for the past
+- combined units with "and" or "," (e.g., "2 years and 1 month", "1 day, 2 hours" or "2 weeks 1 second")
+
+`num` can be a positive or negative integer.
+`unit` can be one of the following: "fortnight", "week", "day", "hour", "minute", "min", "second", "sec" and their plural forms.
+
+## Return Values
+
+The `from_str` function returns:
+
+- `Some(Duration)` - If the input string can be parsed as a relative time.
+- `None` - If the input string cannot be parsed as a relative time.
+
+## License
+
+This project is licensed under the [MIT License](LICENSE).