diff --git a/config.toml b/config.toml
new file mode 100644
index 0000000..5dabb24
--- /dev/null
+++ b/config.toml
@@ -0,0 +1,9 @@
+api_key = "<your API key here from https://developers.yepzon.com/>"
+tags_url = "https://platform.yepzon.com/tags"
+states_url = "https://platform.yepzon.com/tags/{tag}/states"
+locations_url = "https://platform.yepzon.com/tags/{tag}/locations/{state}"
+timestamp_format = "%Y-%m-%dT%H:%M:%S%.fZ"
+timedate_format = "%d.%m.%Y-%H:%M:%S"
+date_format = "%d.%m.%Y"
+time_format = "%H:%M:%S"
+throttle = 9
diff --git a/src/cmd.rs b/src/cmd.rs
index 95291a4..1bb8f85 100644
--- a/src/cmd.rs
+++ b/src/cmd.rs
@@ -11,22 +11,38 @@ pub struct EnvOpt {
 #[derive(FromArgs)]
 #[argh(subcommand)]
 pub enum Subcommand {
-    Run(RunOpt),
+    Since(SinceOpt),
     Init(InitOpt),
 }
 
 #[derive(FromArgs)]
-#[argh(subcommand, name = "run", description = "Run the tool")]
-pub struct RunOpt {
+#[argh(
+    subcommand,
+    name = "since",
+    description = "fetch locations for a given section in time.\nsince and until in format dd.mm.yyy, OR hh:mm:ss, OR dd.mm.yyy-hh:mm:ss"
+)]
+pub struct SinceOpt {
     #[argh(
         option,
         short = 'c',
-        description = "otus",
+        description = "config.toml file path.",
         default = "PathBuf::from(\"config.toml\")"
     )]
     pub config: PathBuf,
+    #[argh(
+        positional,
+        short = 's',
+        description = "the oldest point in time to get locations from."
+    )]
+    pub since: String,
+    #[argh(
+        option,
+        short = 'u',
+        description = "the most recent point in time to get locations from, default = now."
+    )]
+    pub until: Option<String>,
 }
 
 #[derive(FromArgs)]
-#[argh(subcommand, name = "init", description = "Initialize a config file")]
+#[argh(subcommand, name = "init", description = "initializes a config file")]
 pub struct InitOpt {}
diff --git a/src/config.rs b/src/config.rs
index 59a8be1..8e7c7dc 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -9,7 +9,9 @@ pub struct Config {
     pub locations_url: String,
 
     pub timestamp_format: String,
-    pub between_format: String,
+    pub timedate_format: String,
+    pub date_format: String,
+    pub time_format: String,
 
     pub throttle: u32,
 }
@@ -24,7 +26,10 @@ impl Default for Config {
             locations_url: "https://platform.yepzon.com/tags/{tag}/locations/{state}".to_owned(),
 
             timestamp_format: "%Y-%m-%dT%H:%M:%S%.fZ".to_owned(),
-            between_format: "%d.%m.%Y %H:%M:%S".to_owned(),
+
+            timedate_format: "%d.%m.%Y-%H:%M:%S".to_owned(),
+            date_format: "%d.%m.%Y".to_owned(),
+            time_format: "%H:%M:%S".to_owned(),
 
             throttle: 9,
         }
diff --git a/src/errors.rs b/src/errors.rs
index e63d946..8a31bdf 100644
--- a/src/errors.rs
+++ b/src/errors.rs
@@ -52,12 +52,15 @@ impl From<std::string::FromUtf8Error> for GenericError {
 impl Display for GenericError {
     fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), std::fmt::Error> {
         let err = match self {
-            GenericError::ChronoParseError(_) => "Chrono parse error".to_owned(),
-            GenericError::FromUTF8Error(_) => "UTF8 error".to_owned(),
+            GenericError::ChronoParseError(e) => format!("Date-Time value parse error: {}", e),
+            GenericError::FromUTF8Error(e) => format!("UTF-8 error: {}", e),
             GenericError::IOError(e) => format!("IO error: {}", e),
-            GenericError::MinreqError(_) => "Minreq error".to_owned(),
-            GenericError::TomlError(_) => "Toml error".to_owned(),
-            GenericError::YepzonServerError(_) => "Yepzon server error".to_owned(),
+            GenericError::MinreqError(e) => format!("Network error: {}", e),
+            GenericError::TomlError(e) => format!("Toml error: {}", e),
+            GenericError::YepzonServerError(e) => format!(
+                "Yepzon server error: {}",
+                e.message.as_ref().unwrap_or(&String::new())
+            ),
             GenericError::MessagedError(msg, err) => format!("{}\n  {}", msg, err),
         };
         write!(f, "{}", err)
diff --git a/src/main.rs b/src/main.rs
index 9770870..0358716 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -4,7 +4,8 @@ mod config;
 mod errors;
 
 use api::API;
-use chrono::NaiveDateTime;
+use chrono::offset::Local;
+use chrono::{NaiveDate, NaiveDateTime, NaiveTime, ParseError};
 use cmd::*;
 use config::Config;
 use errors::{GenericError, MessagedError};
@@ -23,7 +24,7 @@ fn main() {
 
 fn from_env(env: EnvOpt) -> Result<(), GenericError> {
     match env.subcommand {
-        Subcommand::Run(opt) => {
+        Subcommand::Since(opt) => {
             let mut file = File::open(&opt.config).with_msg(format!(
                 "Could not find {}",
                 opt.config.to_str().unwrap_or("")
@@ -35,11 +36,14 @@ fn from_env(env: EnvOpt) -> Result<(), GenericError> {
             let config: Config =
                 toml::from_str(&string).with_msg("given config file is not a valid config file")?;
 
-            run(
-                &config,
-                Some("1.1.2015 00:00:00".to_owned()),
-                Some("1.5.2021 00:00:00".to_owned()),
-            )?;
+            let since = Some(try_get_datetime(opt.since, &config)?);
+
+            let until = match opt.until {
+                Some(until) => Some(try_get_datetime(until, &config)?),
+                None => None,
+            };
+
+            run(&config, since, until)?;
             Ok(())
         }
         Subcommand::Init(_) => {
@@ -53,12 +57,13 @@ fn from_env(env: EnvOpt) -> Result<(), GenericError> {
     }
 }
 
-fn run(config: &Config, from: Option<String>, to: Option<String>) -> Result<(), GenericError> {
+fn run(
+    config: &Config,
+    from: Option<NaiveDateTime>,
+    to: Option<NaiveDateTime>,
+) -> Result<(), GenericError> {
     let mut api = API::new(config.clone());
 
-    let from = get_opt(from.map(|f| NaiveDateTime::parse_from_str(&f, &config.between_format)))?;
-    let to = get_opt(to.map(|t| NaiveDateTime::parse_from_str(&t, &config.between_format)))?;
-
     let tags = api.get_tags()?;
     let first_tag = tags[0].id.clone().unwrap();
     let state_list = api.get_states(&first_tag)?;
@@ -103,12 +108,12 @@ fn run(config: &Config, from: Option<String>, to: Option<String>) -> Result<(),
     println!("{:<100}", "Done!");
     locations.sort_by(|loc1, loc2| loc2.timestamp.cmp(&loc1.timestamp));
 
-    let _locs = API::get_between(&locations, from, to, false, &config);
-    /*dbg!(
+    let locs = API::get_between(&locations, from, to, false, &config);
+    dbg!(
         &locs.iter().map(|loc| loc.0).collect::<Vec<NaiveDateTime>>(),
         locs.len(),
         locations.len()
-    );*/
+    );
     Ok(())
 }
 
@@ -127,3 +132,16 @@ fn exp_time(api: &API, reqs_left: u64) -> Duration {
     let interval = 1_000 / api.config.throttle as u64;
     Duration::from_millis(interval * reqs_left)
 }
+
+fn try_get_datetime(parsed: String, config: &Config) -> Result<NaiveDateTime, ParseError> {
+    match NaiveDateTime::parse_from_str(&parsed, &config.timedate_format) {
+        Ok(timedate) => Ok(timedate),
+        Err(_) => match NaiveDate::parse_from_str(&parsed, &config.date_format) {
+            Ok(date) => Ok(date.and_hms(0, 0, 0)),
+            Err(_) => match NaiveTime::parse_from_str(&parsed, &config.time_format) {
+                Ok(time) => Ok(Local::today().naive_local().and_time(time)),
+                Err(e) => Err(e),
+            },
+        },
+    }
+}