diff --git a/src/datetime/mod.rs b/src/datetime/mod.rs
index 5c9e888b6e..24a344d9ab 100644
--- a/src/datetime/mod.rs
+++ b/src/datetime/mod.rs
@@ -22,7 +22,7 @@ use crate::format::{
     StrftimeItems, TOO_LONG,
 };
 #[cfg(feature = "alloc")]
-use crate::format::{write_rfc2822, write_rfc3339, DelayedFormat};
+use crate::format::{write_rfc2822, write_rfc3339, DelayedFormat, SecondsFormat};
 use crate::naive::{Days, IsoWeek, NaiveDate, NaiveDateTime, NaiveTime};
 #[cfg(feature = "clock")]
 use crate::offset::Local;
@@ -44,38 +44,6 @@ pub(super) mod serde;
 #[cfg(test)]
 mod tests;
 
-/// Specific formatting options for seconds. This may be extended in the
-/// future, so exhaustive matching in external code is not recommended.
-///
-/// See the `TimeZone::to_rfc3339_opts` function for usage.
-#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
-#[allow(clippy::manual_non_exhaustive)]
-pub enum SecondsFormat {
-    /// Format whole seconds only, with no decimal point nor subseconds.
-    Secs,
-
-    /// Use fixed 3 subsecond digits. This corresponds to
-    /// [Fixed::Nanosecond3](format/enum.Fixed.html#variant.Nanosecond3).
-    Millis,
-
-    /// Use fixed 6 subsecond digits. This corresponds to
-    /// [Fixed::Nanosecond6](format/enum.Fixed.html#variant.Nanosecond6).
-    Micros,
-
-    /// Use fixed 9 subsecond digits. This corresponds to
-    /// [Fixed::Nanosecond9](format/enum.Fixed.html#variant.Nanosecond9).
-    Nanos,
-
-    /// Automatically select one of `Secs`, `Millis`, `Micros`, or `Nanos` to
-    /// display all available non-zero sub-second digits.  This corresponds to
-    /// [Fixed::Nanosecond](format/enum.Fixed.html#variant.Nanosecond).
-    AutoSi,
-
-    // Do not match against this.
-    #[doc(hidden)]
-    __NonExhaustive,
-}
-
 /// ISO 8601 combined date and time with time zone.
 ///
 /// There are some constructors implemented here (the `from_*` methods), but
diff --git a/src/datetime/rustc_serialize.rs b/src/datetime/rustc_serialize.rs
index 51ef5b7230..f704b2f97b 100644
--- a/src/datetime/rustc_serialize.rs
+++ b/src/datetime/rustc_serialize.rs
@@ -1,4 +1,5 @@
-use super::{DateTime, SecondsFormat};
+use super::DateTime;
+use crate::format::SecondsFormat;
 #[cfg(feature = "clock")]
 use crate::offset::Local;
 use crate::offset::{FixedOffset, LocalResult, TimeZone, Utc};
diff --git a/src/datetime/serde.rs b/src/datetime/serde.rs
index 85655c99a6..dcdb36dd0b 100644
--- a/src/datetime/serde.rs
+++ b/src/datetime/serde.rs
@@ -1,8 +1,8 @@
 use core::fmt;
 use serde::{de, ser};
 
-use super::{DateTime, SecondsFormat};
-use crate::format::write_rfc3339;
+use super::DateTime;
+use crate::format::{write_rfc3339, SecondsFormat};
 use crate::naive::datetime::serde::serde_from;
 #[cfg(feature = "clock")]
 use crate::offset::Local;
diff --git a/src/format/formatting.rs b/src/format/formatting.rs
index f11c680e01..c0986732a5 100644
--- a/src/format/formatting.rs
+++ b/src/format/formatting.rs
@@ -11,8 +11,6 @@ use core::borrow::Borrow;
 use core::fmt::Display;
 use core::fmt::{self, Write};
 
-#[cfg(any(feature = "alloc", feature = "serde", feature = "rustc-serialize"))]
-use crate::datetime::SecondsFormat;
 #[cfg(feature = "alloc")]
 use crate::offset::Offset;
 #[cfg(any(feature = "alloc", feature = "serde", feature = "rustc-serialize"))]
@@ -504,6 +502,38 @@ impl OffsetFormat {
     }
 }
 
+/// Specific formatting options for seconds. This may be extended in the
+/// future, so exhaustive matching in external code is not recommended.
+///
+/// See the `TimeZone::to_rfc3339_opts` function for usage.
+#[derive(Clone, Copy, Debug, Eq, PartialEq, Hash)]
+#[allow(clippy::manual_non_exhaustive)]
+pub enum SecondsFormat {
+    /// Format whole seconds only, with no decimal point nor subseconds.
+    Secs,
+
+    /// Use fixed 3 subsecond digits. This corresponds to
+    /// [Fixed::Nanosecond3](format/enum.Fixed.html#variant.Nanosecond3).
+    Millis,
+
+    /// Use fixed 6 subsecond digits. This corresponds to
+    /// [Fixed::Nanosecond6](format/enum.Fixed.html#variant.Nanosecond6).
+    Micros,
+
+    /// Use fixed 9 subsecond digits. This corresponds to
+    /// [Fixed::Nanosecond9](format/enum.Fixed.html#variant.Nanosecond9).
+    Nanos,
+
+    /// Automatically select one of `Secs`, `Millis`, `Micros`, or `Nanos` to
+    /// display all available non-zero sub-second digits.  This corresponds to
+    /// [Fixed::Nanosecond](format/enum.Fixed.html#variant.Nanosecond).
+    AutoSi,
+
+    // Do not match against this.
+    #[doc(hidden)]
+    __NonExhaustive,
+}
+
 /// Writes the date, time and offset to the string. same as `%Y-%m-%dT%H:%M:%S%.f%:z`
 #[inline]
 #[cfg(any(feature = "alloc", feature = "serde", feature = "rustc-serialize"))]
diff --git a/src/format/mod.rs b/src/format/mod.rs
index df75b4ffbc..fda4d425b6 100644
--- a/src/format/mod.rs
+++ b/src/format/mod.rs
@@ -58,6 +58,7 @@ pub(crate) use formatting::write_hundreds;
 pub(crate) use formatting::write_rfc2822;
 #[cfg(any(feature = "alloc", feature = "serde", feature = "rustc-serialize"))]
 pub(crate) use formatting::write_rfc3339;
+pub use formatting::SecondsFormat;
 #[cfg(feature = "alloc")]
 #[allow(deprecated)]
 pub use formatting::{format, format_item, DelayedFormat};
diff --git a/src/lib.rs b/src/lib.rs
index f7638bc6ac..da8e00d17a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -511,13 +511,13 @@ pub use datetime::rustc_serialize::TsSeconds;
 pub use datetime::DateTime;
 #[allow(deprecated)]
 #[doc(no_inline)]
-pub use datetime::{SecondsFormat, MAX_DATETIME, MIN_DATETIME};
+pub use datetime::{MAX_DATETIME, MIN_DATETIME};
 
 pub mod format;
 /// L10n locales.
 #[cfg(feature = "unstable-locales")]
 pub use format::Locale;
-pub use format::{ParseError, ParseResult};
+pub use format::{ParseError, ParseResult, SecondsFormat};
 
 pub mod naive;
 #[doc(inline)]