diff --git a/src/components/fields/AxisInterval.js b/src/components/fields/AxisInterval.js
index cd460aa6a..07040952a 100644
--- a/src/components/fields/AxisInterval.js
+++ b/src/components/fields/AxisInterval.js
@@ -13,6 +13,10 @@ const MILLISECONDS_IN_DAY = MILLISECONDS_IN_MINUTE * 60 * 24; // eslint-disable-
 const DAYS_IN_MONTH = 30;
 const MONTHS_IN_YEAR = 12; //eslint-disable-line
 
+function twoDecimalsRound(value) {
+  return Math.round(value * 100) / 100;
+}
+
 function getSmallestUnit(milliseconds) {
   const units = {
     seconds: MILLISECONDS_IN_SECOND,
@@ -36,7 +40,7 @@ function getSmallestUnit(milliseconds) {
   return smallestUnit;
 }
 
-class UnconnectedAxisInterval extends Component {
+export class UnconnectedAxisInterval extends Component {
   constructor(props) {
     super(props);
 
@@ -54,13 +58,22 @@ class UnconnectedAxisInterval extends Component {
 
   update(value) {
     let adjustedValue = value < 0 ? 0 : value;
+    const isValueInteger = adjustedValue % 1 === 0;
 
     if (this.state.units === 'years') {
-      adjustedValue = 'M' + adjustedValue * MONTHS_IN_YEAR;
+      if (isValueInteger) {
+        adjustedValue = 'M' + adjustedValue * MONTHS_IN_YEAR;
+      } else {
+        adjustedValue = adjustedValue * MONTHS_IN_YEAR * DAYS_IN_MONTH * MILLISECONDS_IN_DAY;
+      }
     }
 
     if (this.state.units === 'months') {
-      adjustedValue = 'M' + adjustedValue;
+      if (isValueInteger) {
+        adjustedValue = 'M' + adjustedValue;
+      } else {
+        adjustedValue = adjustedValue * DAYS_IN_MONTH * MILLISECONDS_IN_DAY;
+      }
     }
 
     if (this.state.units === 'days') {
@@ -89,7 +102,12 @@ class UnconnectedAxisInterval extends Component {
     this.setState({units: value});
 
     if (['years', 'months'].includes(value)) {
-      this.props.updatePlot('M' + Math.round(milliseconds / MILLISECONDS_IN_DAY / DAYS_IN_MONTH));
+      const nbMonths = milliseconds / MILLISECONDS_IN_DAY / DAYS_IN_MONTH;
+      if (nbMonths % 1 === 0) {
+        this.props.updatePlot('M' + nbMonths);
+      } else {
+        this.props.updatePlot(milliseconds);
+      }
     } else {
       this.props.updatePlot(milliseconds);
     }
@@ -100,19 +118,25 @@ class UnconnectedAxisInterval extends Component {
       typeof value === 'string' && value[0] === 'M' ? parseInt(value.substring(1), 10) : value;
 
     if (this.state.units === 'years') {
-      return numericValue / MONTHS_IN_YEAR;
+      if (typeof value === 'string') {
+        return twoDecimalsRound(numericValue / MONTHS_IN_YEAR);
+      }
+      return twoDecimalsRound(numericValue / MILLISECONDS_IN_DAY / DAYS_IN_MONTH / MONTHS_IN_YEAR);
     }
     if (this.state.units === 'months') {
-      return numericValue;
+      if (typeof value === 'string') {
+        return twoDecimalsRound(numericValue);
+      }
+      return twoDecimalsRound(numericValue / MILLISECONDS_IN_DAY / DAYS_IN_MONTH);
     }
     if (this.state.units === 'days') {
-      return Math.round(numericValue / MILLISECONDS_IN_DAY);
+      return twoDecimalsRound(numericValue / MILLISECONDS_IN_DAY);
     }
     if (this.state.units === 'minutes') {
-      return Math.round(numericValue / MILLISECONDS_IN_MINUTE);
+      return twoDecimalsRound(numericValue / MILLISECONDS_IN_MINUTE);
     }
     if (this.state.units === 'seconds') {
-      return Math.round(numericValue / MILLISECONDS_IN_SECOND);
+      return twoDecimalsRound(numericValue / MILLISECONDS_IN_SECOND);
     }
     if (this.state.units === 'milliseconds') {
       return numericValue;
@@ -126,8 +150,12 @@ class UnconnectedAxisInterval extends Component {
     const binStartValue = this.props.fullContainer[attrHead].start;
     const BinStartIsDate =
       typeof binStartValue === 'string' && (isDateTime(binStartValue) || isJSDate(binStartValue));
+    const tick0 =
+      this.props.fullContainer.tick0 &&
+      (this.props.fullContainer.tick0 || this.props.fullContainer.colorbar.tick0);
+    const tick0IsDate = tick0 && (isDateTime(tick0) || isJSDate(tick0));
 
-    return BinStartIsDate ? (
+    return BinStartIsDate || tick0IsDate ? (
       <Field {...this.props}>
         <Dropdown
           options={[
@@ -142,7 +170,7 @@ class UnconnectedAxisInterval extends Component {
           onChange={value => this.onUnitChange(value)}
           value={this.state.units}
         />
-        <div style={{height: '7px', width: '100%', display: 'block'}}> </div>
+        <div style={{width: '100%', display: 'block'}}> </div>
         <NumericInput
           value={this.getDisplayValue(this.props.fullValue)}
           onUpdate={value => this.update(value)}
diff --git a/src/components/fields/derived.js b/src/components/fields/derived.js
index bac55cb9a..451083a37 100644
--- a/src/components/fields/derived.js
+++ b/src/components/fields/derived.js
@@ -6,6 +6,7 @@ import {UnconnectedNumeric} from './Numeric';
 import {UnconnectedNumericOrDate} from './NumericOrDate';
 import {UnconnectedAxisRangeValue} from './AxisRangeValue';
 import {UnconnectedRadio} from './Radio';
+import {UnconnectedAxisInterval} from './AxisInterval';
 import Info from './Info';
 import {UnconnectedColorPicker} from './ColorPicker';
 import {UnconnectedTextEditor} from './TextEditor';
@@ -226,6 +227,24 @@ export const DTicks = connectToContainer(UnconnectedAxisRangeValue, {
   },
 });
 
+export const DTicksInterval = connectToContainer(UnconnectedAxisInterval, {
+  modifyPlotProps: (props, context, plotProps) => {
+    const {fullContainer} = plotProps;
+    if (
+      fullContainer &&
+      fullContainer._name &&
+      (fullContainer._name.startsWith('lat') || fullContainer._name.startsWith('lon'))
+    ) {
+      // don't mess with visibility on geo axes
+      return plotProps;
+    }
+    if (plotProps.isVisible && fullContainer && fullContainer.tickmode !== 'linear') {
+      plotProps.isVisible = false;
+    }
+    return plotProps;
+  },
+});
+
 class UnconnectedNumericFraction extends UnconnectedNumeric {}
 UnconnectedNumericFraction.propTypes = UnconnectedNumeric.propTypes;
 UnconnectedNumericFraction.defaultProps = {
diff --git a/src/components/fields/index.js b/src/components/fields/index.js
index cfae37e96..6322e6b2b 100644
--- a/src/components/fields/index.js
+++ b/src/components/fields/index.js
@@ -40,6 +40,7 @@ import {
   AxesRange,
   NTicks,
   DTicks,
+  DTicksInterval,
   AxisAnchorDropdown,
   ContourNumeric,
   FillDropdown,
@@ -72,6 +73,7 @@ export {
   AxesRange,
   NTicks,
   DTicks,
+  DTicksInterval,
   AxesSelector,
   ColorPicker,
   ColorscalePicker,
diff --git a/src/components/index.js b/src/components/index.js
index 7109c5704..824c87f71 100644
--- a/src/components/index.js
+++ b/src/components/index.js
@@ -9,6 +9,7 @@ import {
   AxesRange,
   NTicks,
   DTicks,
+  DTicksInterval,
   AxesSelector,
   ColorPicker,
   ColorscalePicker,
@@ -103,6 +104,7 @@ export {
   AxisSide,
   NTicks,
   DTicks,
+  DTicksInterval,
   ShapeAccordion,
   RangeSelectorAccordion,
   SliderAccordion,
diff --git a/src/default_panels/StyleAxesPanel.js b/src/default_panels/StyleAxesPanel.js
index fc45380a4..9e13ce75d 100644
--- a/src/default_panels/StyleAxesPanel.js
+++ b/src/default_panels/StyleAxesPanel.js
@@ -3,6 +3,7 @@ import PropTypes from 'prop-types';
 import {
   AxesRange,
   DTicks,
+  DTicksInterval,
   NTicks,
   ColorPicker,
   Dropdown,
@@ -121,7 +122,7 @@ class StyleAxesPanel extends Component {
               />
 
               <DTicks label={_('Step Offset')} attr="tick0" />
-              <DTicks label={_('Step Size')} attr="dtick" />
+              <DTicksInterval label={_('Step Size')} attr="dtick" />
               <NTicks label={_('Max Number of Lines')} attr="nticks" />
             </VisibilitySelect>
           </PlotlySection>
@@ -274,7 +275,7 @@ class StyleAxesPanel extends Component {
               />
 
               <DTicks label={_('Step Offset')} attr="tick0" />
-              <DTicks label={_('Step Size')} attr="dtick" />
+              <DTicksInterval label={_('Step Size')} attr="dtick" />
               <NTicks label={_('Max Number of Labels')} attr="nticks" />
             </VisibilitySelect>
           </PlotlySection>
@@ -310,7 +311,7 @@ class StyleAxesPanel extends Component {
               />
 
               <DTicks label={_('Step Offset')} attr="tick0" />
-              <DTicks label={_('Step Size')} attr="dtick" />
+              <DTicksInterval label={_('Step Size')} attr="dtick" />
               <NTicks label={_('Max Number of Markers')} attr="nticks" />
             </VisibilitySelect>
           </PlotlySection>
diff --git a/src/default_panels/StyleColorbarsPanel.js b/src/default_panels/StyleColorbarsPanel.js
index 5d9b97881..3f2c79214 100644
--- a/src/default_panels/StyleColorbarsPanel.js
+++ b/src/default_panels/StyleColorbarsPanel.js
@@ -15,6 +15,7 @@ import {
   ColorPicker,
   VisibilitySelect,
   NumericOrDate,
+  AxisInterval,
 } from '../components';
 
 export const traceHasColorbar = (trace, fullTrace) =>
@@ -213,7 +214,7 @@ const StyleColorBarsPanel = (props, {localize: _}) => {
                   />
 
                   <NumericOrDate label={_('Step Offset')} attr={prefix + 'colorbar.tick0'} />
-                  <Numeric label={_('Step Size')} attr={prefix + 'colorbar.dtick'} />
+                  <AxisInterval label={_('Step Size')} attr={prefix + 'colorbar.dtick'} />
                   <Numeric label={_('Max Number of Labels')} attr={prefix + 'colorbar.nticks'} />
                 </VisibilitySelect>
               </PlotlyFold>
@@ -241,7 +242,7 @@ const StyleColorBarsPanel = (props, {localize: _}) => {
                   />
 
                   <NumericOrDate label={_('Step Offset')} attr={prefix + 'colorbar.tick0'} />
-                  <Numeric label={_('Step Size')} attr={prefix + 'colorbar.dtick'} />
+                  <AxisInterval label={_('Step Size')} attr={prefix + 'colorbar.dtick'} />
                   <Numeric label={_('Max Number of Labels')} attr={prefix + 'colorbar.nticks'} />
                 </VisibilitySelect>
               </PlotlyFold>
diff --git a/src/index.js b/src/index.js
index f53cee550..7d6856974 100644
--- a/src/index.js
+++ b/src/index.js
@@ -35,6 +35,7 @@ import {
   TransformAccordion,
   NTicks,
   DTicks,
+  DTicksInterval,
   AxesSelector,
   PanelMessage,
   Button,
@@ -107,6 +108,7 @@ export {
   AxesRange,
   NTicks,
   DTicks,
+  DTicksInterval,
   AxesSelector,
   Button,
   ColorPicker,